Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd29d75a4706a0c2…

MALICIOUS

PDF

77.1 KB Created: 2021-08-04 02:01:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 945835135c839e152a6e05326767e9fd SHA-1: 80b310dfd1d9d538cc79abb17912c20eed595543 SHA-256: fd29d75a4706a0c281a9c265063cf2e07f2223bdcd279f69dc8a432a5bef2c74
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the PDF contains a link farm pointing to compromised WordPress upload storage, suggesting a phishing or malware distribution lure. The embedded URLs and the nature of the heuristics strongly suggest the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f37c275fc8---45463987222.pdf In PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/6c8fd623ee6a58da17e97cd2f3c29a25/26576255384.pdfIn PDF document text
    • http://thumpamonpally.com/userfiles/file/gitanixokin.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/8veopfhiorel94fu5f122tp6ft/1277822920.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa8c7517c0---tifumojarezevadegenawe.pdfIn PDF document text
    • https://akvaguru.hu/user/file/9047708192.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a24011b445---kurozenovafunogiloviver.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/bb0b00bcd81f29037ceabf4a8dd22a8c/45842455718.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f27f16a7bc---zalizifilu.pdfIn PDF document text
    • http://xpeedon.net/userfiles/file/20210728051322.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/8nqfb4ja6n98q97ihqqsjekjf3/movevofiv.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/26187938485.pdfIn PDF document text
    • http://uci.ir/userfiles/file/8403960291.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/77970134889.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d5f6d0668---bopak.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b18386a061e---wigunukevibujubojolalu.pdfIn PDF document text
    • http://yuhongzg.com/d/files/46072390549.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c90710b1c1f---13090659774.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e0ed02a949---duzex.pdfIn PDF document text
    • http://ydis.kr/userfiles/file/07185442501.pdfIn PDF document text
    • http://patanamachine.com/imgUpload/files/73554439007.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/70b69570e15896d01d32986771aec31b/28374385668.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/97c49108ab327dcc62f36a578dbb5d6d/jupeven.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=how+do+you+convert+oz+into+poundsPDF link annotation
    • 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_off0000c9a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e1bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BF 10716 bytes
SHA-256: 625acfe7469d2807f29e84f4c771ffca06854207b8e8b2ea0623b87f634f4aa9
font_02_sfnt_off0000fa8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8B 17204 bytes
SHA-256: 45923b45ac18763c7b9a86f510d2a247e7fd7aa7b015a7f5bb5b39d26f348d01

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