Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d4c71b3613a8797…

MALICIOUS

PDF

72.6 KB Created: 2021-04-02 00:01:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: abe47f8740ccc3f437cf0cdf2bcd8796 SHA-1: c1bc2072f2c1b59de417d5a7af595150f361e1af SHA-256: 6d4c71b3613a879798f851194b3efd64b771848342c6339a274f0c31dc3e0743
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a PDF SEO link farm. The primary malicious URL, 'https://lozipotod.ru/wix?keyword=west+michigan+glass+coatings', is flagged as an SEO redirector likely used for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and heuristics strongly suggest an attempt to drive traffic to malicious sites, aligning with phishing and potentially further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://lozipotod.ru/wix?keyword=west+michigan+glass+coatings PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4415321/normal_5fff4eae2e5fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486548/normal_60593acf1d03b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472506/normal_60663474eec13.pdfIn PDF document text
    • http://successinyourlif.website/66741524787miei5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381544/normal_605d855c72bc6.pdfIn PDF document text
    • http://jnatural.space/el_oscuro_juego_de_lucifer_2vqvow.pdfIn PDF document text
    • http://gaydating.world/civil_engineering_books_drivere13x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379471/normal_601bb39249cbc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3175e58c-9db9-4d87-bcb9-15e03531d93d.filesusr.com/ugd/c93210_591b20f3d1334ad9a61d81416be4dae9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zesixefe/51951538405.pdfIn PDF document text
    • https://s3.amazonaws.com/kegovev/zoxitafosutosamabo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04daebc9-ff00-4e01-b281-f980d728267c/what_is_the_purpose_of_internal_audit_charter.pdfIn PDF document text
    • https://b23183eb-b2e5-455e-bc25-91fac1efd10f.filesusr.com/ugd/cc14e4_cd0e65a118144c97ad6b1705d4f99e16.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/how_long_is_harry_potter_6_without_credits.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/15899697438.pdfIn PDF document text
    • https://a121017b-3fb3-450c-9156-48dd71a9bf80.filesusr.com/ugd/07625c_b951e8c0d01f456a8be96d31f280203e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b1c4d2b-0528-4251-a42c-d8aeeb382965/lg_tromm_washer_drain_pump_noise.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/gisobawavoriwuluvokulow.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/boat_transfer_additional_ownership_form.pdfIn PDF document text
    • https://1639490a-f715-481e-9fb1-af38d332269b.filesusr.com/ugd/a59130_cbac4f46a14742e1b27752bc78b583d2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e812bba-9c41-4177-8eb1-77b3d0e88690/gukisixoburosesumovalu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2881ccd-8873-43ad-a011-b7847d45023a/cronica_de_una_muerte_anunciada_personajes_y_caracteristicas.pdfIn PDF document text
    • https://1b6fbac1-9b66-4609-9151-81f5d4c316f7.filesusr.com/ugd/5e81b9_ba7fb0c56b0f46289eb8af0f9fb8b60f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/315503fe-f927-499a-9170-b144373ee036/ford_f-350_owners_manual.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_off0000df5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5C 5128 bytes
SHA-256: f0404a1139b744181f8b56398eb10032135da36fe19bad6ff82eb1b741b8e53a
font_01_sfnt_off0000f0ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BA 10632 bytes
SHA-256: 1e44611852bf3493280c65678755ff652ee47d876838fa3a41984032351ed219