Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2eb5153700dafb0…

MALICIOUS

PDF

84.7 KB Created: 2021-07-28 04:37:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 34b86d20c145c724f38373a89fdbe6bf SHA-1: c34b1f5177436b013dbb5959aa0bc9743d9a0198 SHA-256: f2eb5153700dafb08423d2947fe461e49c855e14ee352321b295dd4039597534
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document flagged by multiple heuristics as malicious, including ML classification and ClamAV detection. It contains numerous links to external sites, many of which appear to be compromised or disposable hosting, suggesting a link farm for distributing malicious content. The 'SE_ADVANCE_FEE_SCAM_LURE' heuristic indicates the document's content is designed to trick users into believing they are receiving a parcel or prize, a common social engineering tactic for advance-fee fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://turagent007.ru/userfiles/file/bexipapejosiwa.pdf
    • http://homelife-superstars.com/image/files/65742281430.pdf
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/988d0a099c2a1efa2adbfde170a38450/jimalixojebikukubuxixetav.pdf
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16073b96102ee2---xizename.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd1801a4c7---xokogafuwelesobumoramid.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cfa6d685d4---21713442161.pdf
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/vcfmupamebt6fjmmh8vt6pge56/wamaxitoxo.pdf
    • https://ketdoanbus.com/webroot/img/files/wotedekekunididoki.pdf
    • http://airlineclassof66reunion.com/clients/c/cb/cb51827d251551eca15067b3b23580a4/File/linozadutunanurubetigu.pdf
    • https://showdetango.com/bafa/userfiles/file/56842309346.pdf
    • https://tranhtreo.com/images/ckeditor/files/dudusawe.pdf
    • http://ruresept.ru/files/file/sinufazoselotuxuxam.pdf
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081a2281fb0b---kasiwapujogumonerewetizu.pdf
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/d9bfb7a62ed1354c7a51eb5451d68a62/fuzifuligewirowewovufi.pdf
    • http://pattersonandoliphantfamily.com/clients/875492/File/gujefowajato.pdf
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/951a0cd4641c036bbb503ce7f7cbc9c1/83624014556.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/u3u3tsi5ahrnd7rm2mkc01i426/90763059878.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d40c2d6ae1---tudivukixabeler.pdf
    • http://ckm-machinery.com/userfiles/files/50691844874.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=interesting+funny+facts+about+human+body
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e721.bin
606004eaa308a6f9c62d2c970aae6af07e49b13c549149187ff29adc2f9a712f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE721 11184 bytes
font_01_sfnt_off000100f4.bin
7853e40c07ee1e18a2b7b1678615133aac1d274d4b4c6a5efaca8bf02e72f408
pdf-font-stream PDF embedded font (sfnt) at offset 0x100F4 17124 bytes
font_02_sfnt_off00012d1a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D1A 16792 bytes