Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fc791f8951feffd…

MALICIOUS

PDF

123.9 KB Created: 2021-03-19 11:58:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac977fd563b684cab3bc68cf28af2da2 SHA-1: 78b48f6fde10d132a88af9fdea81f70b826a2f05 SHA-256: 7fc791f8951feffdcd1dd9e98031cf7728873e8aa23c88b0245cb06c08ecf91e
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains heuristics indicating it is a phishing and advance-fee scam lure, with embedded links to external resources. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains keywords related to 'key replacement' and 'invoice', aligning with the identified lures. The presence of multiple external links, including one to 'mihetos.xyz/lodekusoxirejowewega7n.pdf', suggests a potential download or redirection to a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 9

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://zajinet.ru/wix?keyword=aaa+premier+key+replacement
    • http://mihetos.xyz/lodekusoxirejowewega7n.pdf
    • https://rarezeromodon.weebly.com/uploads/1/3/0/8/130874170/983071.pdf
    • https://cdn-cms.f-static.net/uploads/4377120/normal_601b3666a31b7.pdf
    • http://titoto.xyz/energizer_xbox_one_controller_charger_flashing_red61di3.pdf
    • https://nugijokokul.weebly.com/uploads/1/3/0/9/130969158/povawir-dokopekipokap.pdf
    • https://faxomozux.weebly.com/uploads/1/3/0/7/130775398/pelixikumamun_kidokavewib_fixorirakosopuv.pdf
    • https://static.s123-cdn-static.com/uploads/4366982/normal_5fe367f85fa82.pdf
    • https://vukujaxirebes.weebly.com/uploads/1/3/4/1/134108713/032bbad72.pdf
    • http://reawolt.online/rinnai_e110cn_parts_listw0z55.pdf
    • https://fofifakexetag.weebly.com/uploads/1/3/4/3/134345684/wibedira-tevetunudezuj.pdf
    • https://cdn-cms.f-static.net/uploads/4471488/normal_600f9d0ca0c52.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://suvugadozomamu.rf.gd/mage_the_awakening_free.pdf
    • https://uploads.strikinglycdn.com/files/74b516e8-55ab-4585-828d-54066103bcc7/hewlett_packard_officejet_pro_8500a_manual.pdf
    • https://c9977776-9e37-4432-9eae-e541147807da.filesusr.com/ugd/bb6cc6_e916230f3b05467589faf8bcbe6a323c.pdf?index=true
    • https://6a9ecc2b-05c3-4056-8705-773ae6be8cdd.filesusr.com/ugd/7a359d_827b9a3300ab4aeb903c0e0dc755ab0f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c499943b-1ee4-41b0-b14d-6fd97b3525cb/64708191855.pdf
    • https://d2ea4bfc-f92a-4379-acf2-d9b69981ddb7.filesusr.com/ugd/739437_33a70c63e35948ab97e883241b013f9b.pdf?index=true
    • https://05e27880-d5e1-4d3d-8428-ba943e9300bc.filesusr.com/ugd/b56239_3089542a8c8345ecb81e680f057e9974.pdf?index=true
    • http://rinonefor.rf.gd/asus_rt-ac68u_change_password.pdf
    • http://nabunuwo.epizy.com/best_christmas_carols_lyrics.pdf
    • http://mijekobafenado.rf.gd/76548420621.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a81f.bin
e8de3ac1f1e06bd5af2e02180c0f9381acdfaa8683f21e04c77f26a9565e306f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A81F 5056 bytes
font_01_sfnt_off0001b94e.bin
18817ce955974f958b8ae9e26c962aadd8740c489988fd2d50a40b1d525a3dc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B94E 12096 bytes

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