Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3280c980e7a982a…

MALICIOUS

PDF

125.9 KB Created: 2021-04-08 20:19:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 13de46a08d2028caf6c1763d9d589387 SHA-1: 2d385a9a789b587573080727c8f82640b713fd72 SHA-256: b3280c980e7a982a3feab331bbf5bbcfe781ef6940dc98b2c4c9f99f7186a2e5
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The primary malicious URL identified is https://jottigo.ru/strik?utm_term=noco+genius+g7200.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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 https://jottigo.ru/strik?utm_term=noco+genius+g7200 PDF link annotation
    • https://cdn.sqhk.co/dabebasavus/ib1d4ia/gta_5_diamond_casino_heist_most_money.pdfIn PDF document text
    • https://giderolimarova.weebly.com/uploads/1/3/4/0/134098849/c13f6999a3fa.pdfIn PDF document text
    • https://cdn.sqhk.co/norekabalak/giGjbP5/rs3_dagannoth_slayer_guide.pdfIn PDF document text
    • https://kewakovek.weebly.com/uploads/1/3/4/4/134467638/9426334.pdfIn PDF document text
    • https://cdn.sqhk.co/musutalivun/P5dgiYe/6785502776.pdfIn PDF document text
    • https://cdn.sqhk.co/joxomawezu/Zjdgfhh/fevebojevita.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/hbbVQ3v/3d_video_player_for_android_mobiles.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1e16f6d7-285b-4488-bf07-d3e24ac90e20.filesusr.com/ugd/417718_ca39b8614db34c6580eb31070bfb568a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/51683260958.pdfIn PDF document text
    • https://4f0754e2-f0c4-47db-826b-83042027646c.filesusr.com/ugd/7a11b0_41b343b7023f483d9b72ede0b27ce0b5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sinadi/71921422532.pdfIn PDF document text
    • https://f803bf1b-e1c2-47f6-a41f-c9785c88fbd4.filesusr.com/ugd/bf07b1_2ce30afcb2f34c16a57adc59015fbc3e.pdf?index=trueIn PDF document text
    • https://ce322291-b3da-4cc2-ae0f-523e25daec44.filesusr.com/ugd/4530da_1449386ccf3b4f7c996b8f707768ed62.pdf?index=trueIn PDF document text
    • https://7c5e2310-e79b-429e-9f4a-70471a43dcce.filesusr.com/ugd/8ec1ef_c81cc6b3bf5e4be6ba0a9af49c9e82ca.pdf?index=trueIn PDF document text
    • https://c46c713f-5e69-4c64-aad4-d86f29440f76.filesusr.com/ugd/957c7b_f1d0b00014fc46bf809566e15b9f1f3a.pdf?index=trueIn PDF document text
    • https://dd54f144-242a-4a88-9385-6c39f9996aab.filesusr.com/ugd/9f32c1_45b2bb2f3c9044978485a8797081440f.pdf?index=trueIn PDF document text
    • https://cc4f1b1a-08c7-467e-bb5a-e3073ad8caf1.filesusr.com/ugd/ffc175_ed662bc0740a475ea5eb8619da117cc9.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE401 67440 bytes
SHA-256: 058792a260e3f2b81e757a280b47cb9f0dd056ece13adf9a14a30c4a5c6c9b5e
font_01_sfnt_off0001add3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ADD3 4952 bytes
SHA-256: 5ea86bf05cab844cfa28e2c15fe1b677e543fc67a1edff8630934b2e58307483
font_02_sfnt_off0001bede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BEDE 12772 bytes
SHA-256: 32999bb53efac7d58a84e52ed85019ff3df95273a6ee17a870bac7ea09c6fcf8

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