Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe91ab50e7d9e625…

MALICIOUS

PDF

81.4 KB Created: 2021-09-07 15:35:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 48d2e079d14bb2baeb9ea745ee1ae9ff SHA-1: c1c36014c3529bb3f259f3b5109ab8fcdfff2405 SHA-256: fe91ab50e7d9e6259cea24e26d3c5e97bc6e3e141d6f000bddf13dfa7020c77c
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS platforms or disposable domains. The presence of numerous unknown URLs suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://asbazainville.org/userfiles/file/fofuv.pdf In PDF document text
    • http://ehomeforeclosure.org/images/file/datadedukomamamax.pdfIn PDF document text
    • https://safetypadlocks.eu/eurostyl/photos/file/42159196630.pdfIn PDF document text
    • http://abwlanham.com/uploads/files/91449325582.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8a9d63315---mowejukemejorobubinogis.pdfIn PDF document text
    • http://bellina.pl/userfiles/file/xufovunuwavavuxorezalexu.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/a6eb53821cc623f38046b7ef67a12f65/bejowimasetitinibo.pdfIn PDF document text
    • http://ranahytta.com/ckfinder/userfiles/files/moxekimadizizo.pdfIn PDF document text
    • http://izdo.org/img/userfiles/files/bukawilubiduxuforegupot.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16113715018eaa---vitaginexaremovudelita.pdfIn PDF document text
    • http://smepil.com/ckeditor/userfiles/files/lefeguxurobanewel.pdfIn PDF document text
    • https://serrechevalier-skifun.com/imagesfile/perade.pdfIn PDF document text
    • https://armenia4d.com/contents//files/tofukupajajawopuw.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/xaruwo.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/36981416ea09a5fd4d35cbc13f8fc541/65031958836.pdfIn PDF document text
    • http://www.temaricerca.com/entry2013new/admindia/ckfinder/userfiles/files/visikadunewe.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b85b15903---53632282929.pdfIn PDF document text
    • http://quaint-house.com/noxisotuzumozovikuwufidex.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/53535847269.pdfIn PDF document text
    • http://elma-itc.ru/!upload/files/41189478093.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/d8ddc938170a33e7d10347210f4d0319/24385474961.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=jailhouse+strong+8x8+off-season+powerlifting+program+pdfPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/a938435ffa049526bbeed10ef4f107ee/xejenanoviwofirol.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_off0000d5e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000edf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF6 17684 bytes
SHA-256: 59b102c64eb52bbdfd0e67026bd69a5c1389265f461d79cf66469c8db76bd095
font_02_sfnt_off00011c30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C30 11464 bytes
SHA-256: df9b247e0bdaf89eb25ee3a56b67939b5a1a2de2e9ab1a385cf956bf6af3a180

Open this report in the interactive analyzer, or submit your own file for analysis.