Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d916be1e3b7a3ee…

MALICIOUS

PDF

112.6 KB Created: 2021-04-05 20:53:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 02f463675e6177599ba270f10797f9b0 SHA-1: 311ae1af815bcb796eecab1abd169ac5f32fe384 SHA-256: 6d916be1e3b7a3eed91430f841d0f30854aef2a9310b380e3875ecb583be5710
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains a link farm with numerous external URLs, many hosted on disposable domains, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to the cost of a Cessna 172, likely to trick users into clicking the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://cdn.sqhk.co/puvubuzu/jhhNCjc/bekadasosizokutetajut.pdf In PDF document text
    • http://yozi.store/emotional_intelligence_2.0_test_results2i7ni.pdfIn PDF document text
    • https://cdn.sqhk.co/bupewazadufa/hhhdugc/wigivulinubije.pdfIn PDF document text
    • https://cdn.sqhk.co/nozedimasav/hiijgha/21288754842.pdfIn PDF document text
    • https://cdn.sqhk.co/putizimetiwe/gfjgx8V/tarezenizebovavibigevetev.pdfIn PDF document text
    • http://bekasopeli.22web.org/oil_gas_company_analysis_upstream_midstream_and_downstream.pdfIn PDF document text
    • http://familyit.pro/263470101001p67v.pdfIn PDF document text
    • https://cdn.sqhk.co/gulanuwe/eij5Rak/87472043132.pdfIn PDF document text
    • http://checkmycredit.info/3512776053661tbm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/3IgsHNHpEfs/wb?keyword=what%20is%20the%20cost%20of%20a%20new%20cessna%20172PDF link annotation
    • https://uploads.strikinglycdn.com/files/8e7aa8a2-da13-4854-8da3-867e3a54aaa6/bavofolatujadujote.pdfIn PDF document text
    • https://cf268418-7549-4780-9cff-e39e61b5276c.filesusr.com/ugd/0b1cf2_a06deface39d4e11a5b7ff1b3befbf7b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8beec39a-884e-44f3-bae5-49374a9f42b5/neuro_linguistisches_programmieren_fr_dummies.pdfIn PDF document text
    • https://79c9c32e-6572-42fd-9c0e-61d057d48a34.filesusr.com/ugd/33a1c8_82de49daa75e4af58de4d74d49b4f3f4.pdf?index=trueIn PDF document text
    • https://02e0da19-eac5-4521-950b-4e410541bf1c.filesusr.com/ugd/516249_9ba7b800c34d498fbdca20dfabc242ba.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4f2977a-1c0c-45a1-9ad7-f7c865294c76/fejivi.pdfIn PDF document text
    • http://xatudoxi.epizy.com/lemamuxufajogajerefavinin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed9c88dc-35e2-4bee-8112-a04b1a2ce9a0/82167640404.pdfIn PDF document text
    • http://saragodofoli.epizy.com/libro_automatismos_industriales_gratis.pdfIn PDF document text
    • https://fe426b01-1dd0-498a-b08e-7ec37e320b94.filesusr.com/ugd/6b45f0_373323225d5746058bc14700fb02c79f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/67f651f4-e468-4b35-8349-7387ff3c8ade/amped_wireless_r10000_setup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7efce2e-77cf-43ec-99bd-606b08acc160/kadakejefemulalelume.pdfIn PDF document text
    • http://bexisojulodu.epizy.com/descriptive_research_definition_by_authors_2020.pdfIn PDF document text
    • https://abaaaae4-9231-44fc-b12c-ad55ebcc68e7.filesusr.com/ugd/2ca09c_9b0de1da11e94d08af18958b9e05a7c2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/474ba6d9-a55d-46e9-bc95-581338100e2e/60070660043.pdfIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017a14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A14 5208 bytes
SHA-256: 882aa651c2c56f992625045c8d71342580b253f59efa962440a944745889584c
font_01_sfnt_off00018bf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18BF5 12456 bytes
SHA-256: c5306d7d6cfbfb0d2d77ea24d147003db607a6d29c01d5ba65568397fd9d6063

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