Malicious PDF — malware analysis report

Static analysis result for SHA-256 a469fc3c3829b488…

MALICIOUS

PDF

86.5 KB Created: 2021-06-26 08:23:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bac72d9061959cce7781c0523916ee19 SHA-1: aa1a5bd83eb8723210ff59109773a6dd3396b52b SHA-256: a469fc3c3829b488b8d2a93b2303cd42df86f8949c7372cac340b9c06b6bfa54
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The document body was unreadable, but the heuristics indicate a lure with urgency, further supporting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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
  • 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 https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/5d7038f2d87a57ae52682348d7c1fe68/39908554686.pdf
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7abe8d7eb2---pojuka.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606da4efd8b71---daruzakagite.pdf
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/af98dfa2d305903fbbb8dc3ce115ae7b/43554515178.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ac069a2d501---89020492987.pdf
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b3ec8bb6b65---70596466236.pdf
    • https://sudhirsachdevaclasses.com/ci/userfiles/files/kepawilufatimedexizeke.pdf
    • http://stinpo.com/ckfinder/userfiles/files/wesejoxumakoxexibobofif.pdf
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609a818b37bc0---xekudafurevimirivana.pdf
    • https://ludifrance.fr/userfiles/file/sukimobigukedamuto.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/taj9cfduim2gtt00vtidc06es5/20505824697.pdf
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/ddedb1e6285d24d400993cf8134d3514/32698051565.pdf
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160982a3a85d4f---fovotitumisor.pdf
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/7vs4c2relbcgojkkpm7ktgbp57/pezuvigonap.pdf
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/p2h9em3m2c5hlknhbknhh60j00/gokatala.pdf
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0f269eace---98274437704.pdf
    • http://dientrotiendathc.com/media/ftp/file/85034239237.pdf
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f92f42879---80796029781.pdf
    • https://unosms.us/userfiles/file/81228138903.pdf
    • https://batikatravels.com/userfiles/file/lovuz.pdf
    • http://ubest.ru/images/file/bukufeperigedi.pdf
    • http://accessiblevehicleservices.com/userfiles/file/veripodokerorib.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=common+allergies+that+cause+hives
    • http://e1pl2.nazwa.pl/busy/fotki/file/fomebemopazexapotesitup.pdf
    • 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_off0000eeb1.bin
074cd5d352f36f3f2bd95c13bbe2f4c31a8334714e175603a453c4c245073fda
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB1 16892 bytes
font_01_sfnt_off00011a47.bin
600cffa7ff4a26a4ffff076b527d5147facbae00b443401423ce75249f03c2db
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A47 10876 bytes
font_02_sfnt_off0001333d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1333D 16792 bytes