Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e593710084a74bc…

MALICIOUS

PDF

82.2 KB Created: 2021-09-15 18:06:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: b7670c05e400ea574405b34dba428729 SHA-1: 80bc342828182717b8117c6fc28855d44fce7152 SHA-256: 1e593710084a74bc92816c20ebd179899ac1116b7ad8c0e760ee8a47d8b68652
174 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs pointing to a link farm hosted on disposable domains, a common tactic for phishing or malware distribution. The heuristics indicate a lure involving QR codes and callback phishing, suggesting an attempt to trick users into interacting with malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://01host.ru/userfiles/files/buluduvolesobosutavijus.pdf In PDF document text
    • http://oxigensupplies.com/shipinc/userfiles/files/63413004117.pdfIn PDF document text
    • https://adeptos.clevercloud.pt/images/items/files/11194941833.pdfIn PDF document text
    • https://selispin.com/calisma2/files/uploads/boruzafigakuzapika.pdfIn PDF document text
    • http://szguilong.com/userfiles/files/991897404.pdfIn PDF document text
    • https://rewaqousha.net/userfiles/files/3813873650.pdfIn PDF document text
    • http://dotykbylinky.sk/_subory/subory/tuzadovifuduwazejanijata.pdfIn PDF document text
    • https://nutrishop.in/ci/userfiles/files/vabox.pdfIn PDF document text
    • http://mpwlawpa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/94928000719.pdfIn PDF document text
    • https://loffoxfitness.mvwebsolution.com/userfiles/files/duturires.pdfIn PDF document text
    • https://www.nvsrolko.org/ckfinder/userfiles/files/bopivuvixuxad.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140a447d2bee---lefobogosigipegu.pdfIn PDF document text
    • http://ybshajiang.com/userfiles/file/2021-09-12/210912230659510557aspesbg3o1xg.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/7352049741.pdfIn PDF document text
    • http://studiobaldizzone.com/userfiles/files/powegubowosanevanis.pdfIn PDF document text
    • http://dealershop.es/userfiles/file/lixokemolow.pdfIn PDF document text
    • http://anticacarsulaeborzoi.eu/userfiles/files/72839119596.pdfIn PDF document text
    • http://arkystudio.eu/userfiles/files/6771675820.pdfIn PDF document text
    • http://ticaproduce.com/ckfinder/userfiles/files/40702344760.pdfIn PDF document text
    • https://oferta.lt/i/File/31679923260.pdfIn PDF document text
    • http://mediedil.eu/userfiles/files/zibowazuduv.pdfIn PDF document text
    • http://ilturismoinitalia.it/userfiles/files/suvetirezatoze.pdfIn PDF document text
    • http://01host.ru/userfiles/files/fidigofagirebaf.pdfIn PDF document text
    • https://literie-depot.fr/UserFiles/file/9046023547.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=qr+code+iphone+4sPDF 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_off0000d7b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC5 19384 bytes
SHA-256: 957d54f0b20a56de17b83cf75dcb56b5ceeff882de9de8a755e40a2b0e3f0b25
font_02_sfnt_off00012221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12221 10444 bytes
SHA-256: 280fc42ce6aec793d8a339c78ee6402742b6107e8f7faf5710bc70f09fc2b8a5