Malicious PDF — malware analysis report

Static analysis result for SHA-256 e47fd4a8ddaf0aba…

MALICIOUS

PDF

77.7 KB Created: 2021-08-28 04:17:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: d9b5a8332598aee23899ee9d1230882b SHA-1: 02547e795fc3208abcd73c52b9d933a28bebb788 SHA-256: e47fd4a8ddaf0abaae1d903395373a001bcd7d588d3e93abe0899e9c6d688270
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a lure for phishing or malware distribution. No scripts were extracted, but the extensive use of external URLs is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://cructi.ru/uplcv?utm_term=64+vinal+ave+scituate+ma PDF link annotation
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/1k4pahnneot5tpt3v207d3rk93/45841292043.pdfIn PDF document text
    • https://sikanderajam.com/Robinson/ckfinder/userfiles/files/xajarovakusozixukomulom.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/9a352ac0f71051520160db5453e3b462/watibin.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/345db7b8febdd1d3083937e2e2625eb0/zurufus.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/a48c1f61da06b0f2de22cb2b6b90c410/71881858718.pdfIn PDF document text
    • https://quangcaowebsite.vn/uploads/files/69339263285.pdfIn PDF document text
    • http://ylgems.com/file_media/file_image/file/73158535106.pdfIn PDF document text
    • http://seoulgreeter.com/userData/board/file/95563798099.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082b35c4695a---70623039020.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1606d31df4e003---zemibeforam.pdfPDF link annotation
    • http://erbaytag.com/resimler/files/36517253854.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/oo008jr9svgp19qnf6j6h5jjnf/fetatavux.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16080211b96f09---46819447924.pdfIn PDF document text
    • http://thuocnam.xyz/images/files/nesilobadepo.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/81057387622.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16121ce3e2b482---91257176824.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/7h4iaj9do9pt6atq1d8snsp5m1/tejabugovolaxusobadivigix.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/e406911fc60d3830296e8b67f0b4a3a4/natelozeluko.pdfIn PDF document text
    • https://queensflower.nl/clientfiles/80227851756.pdfIn PDF document text
    • http://paulabenveniste.com/UserFiles/file/sekawidofowojer.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8c493c78ed---sutufifavebopoloxadijin.pdfIn PDF document text
    • http://herborgthailand.com/file_media/file_image/file/16699988864.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d65dfb07abb---zoputubigajeg.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3527a96aa---gojemofusilopepenufutub.pdfIn PDF document text
    • https://webshopplus.nl/app/webroot/files/userfiles/files/13026450046.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210703153113685.pdfIn PDF document text
    • https://doublehaircenter.com/upload/ckfinder/files/gelizalelupamopar.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC3C 16832 bytes
SHA-256: 8025f7b7282abf7ca7219481c1ca8229b38d4ab78314c75fe359a6364f608418
font_01_sfnt_off0000f838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF838 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001104f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1104F 10484 bytes
SHA-256: 8f1e23c7a005c39222d7d4f8f3a53584bd4c25920ef76316041f820a8d51520c

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