Malicious PDF — malware analysis report

Static analysis result for SHA-256 565969cc901c51f2…

MALICIOUS

PDF

74.6 KB Created: 2021-04-03 13:33:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: b531e0f303b5a695c65360a8ada7ddd1 SHA-1: 3dd1e58c4fb996ad3834d43b5f8f5556bead0421 SHA-256: 565969cc901c51f2071a893ab85b71e0d7a4e089d6b7164e8033d2f6c49f1b64
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, indicating a link farm designed to obscure the true destination. ClamAV and ML classifiers flagged this as malicious, specifically a phishing or trojan variant. The embedded links suggest a spearphishing attachment delivery vector, with the ultimate goal of directing users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • 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://kajugolake.weebly.com/uploads/1/3/0/9/130969904/taxiwejabitev_zukeburuwulogej_tisariwek_bodupijamid.pdf In PDF document text
    • https://cdn.sqhk.co/nonuripot/pwrghie/football_player_agent_salary.pdfIn PDF document text
    • https://cdn.sqhk.co/repejuvovod/aSMSQoQ/dinoland_play_centre_aldi.pdfIn PDF document text
    • https://jumewabob.weebly.com/uploads/1/3/0/7/130775497/dikodula_lolofaletidi_biropewe_vinenorosudimi.pdfIn PDF document text
    • https://fumabufoduf.weebly.com/uploads/1/3/5/3/135313851/fetijeniperu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450907/normal_606197b1e3918.pdfIn PDF document text
    • https://cdn.sqhk.co/kuderoxuz/hiPhqgj/knife._io_games_of_star_battles.pdfIn PDF document text
    • https://rebejudan.weebly.com/uploads/1/3/5/3/135316845/xuboxokilofex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406473/normal_5fc89916c3774.pdfIn PDF document text
    • https://cdn.sqhk.co/vilubofi/bGagdq6/funotami.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484365/normal_6054dc388bb57.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/Ecv9gJ3Ok6E/wb?keyword=delta%20table%20saw%20parts%20ebayPDF link annotation
    • https://caa91486-5fcc-43b7-8b2b-5b817ae85bbe.filesusr.com/ugd/26bbcf_84228448431c4204b9c0d74e5a95d749.pdf?index=trueIn PDF document text
    • https://6cdf8c5e-36a0-4b6d-987f-32d3d50030cd.filesusr.com/ugd/3c2e2e_2715f21dbe5a4e2a979e7f0f5986bbe2.pdf?index=trueIn PDF document text
    • https://e0fa0743-814d-41de-b6a5-47f787911882.filesusr.com/ugd/89d2ef_d74d9e1981aa4a169596c3e34393879e.pdf?index=trueIn PDF document text
    • https://247e77cc-5367-4382-8586-7c5891409f42.filesusr.com/ugd/2dbf5a_42ab8817a095470bae79498f37930b10.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a75d19d-c83f-4d41-81ea-7556f3cb4135/what_to_give_for_boss_birthday.pdfIn PDF document text
    • https://1b65b899-5fad-42bd-af9e-a3fb1d6a4c80.filesusr.com/ugd/a2ebd8_4f27d2f67e59452a8f08c4cfc1761544.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/299a7e4e-2d23-4b02-b67e-eaaa3f460bc3/quran_in_hindi_with_arabic_pronunciation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d81572ee-2358-40bc-a722-b3de40b09769/53280290871.pdfIn PDF document text
    • https://1b6fbac1-9b66-4609-9151-81f5d4c316f7.filesusr.com/ugd/5e81b9_1c9a15cfd59141388d24c6f78c7d6959.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a61b5ef-0863-4ca1-8af1-cc07794faecf/tidoxubene.pdfIn PDF document text
    • https://7a1f2a0d-094a-4466-88af-72a4af93b9fa.filesusr.com/ugd/22739b_da8ff3abef034879b3410955e61d1fa4.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A4 5148 bytes
SHA-256: adc40021757163db6242d12f7f95a5ac08021473cf11c593ff072c558b10affc
font_01_sfnt_off0000f74a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74A 10884 bytes
SHA-256: 414af862cdae477bbc6b8763b0a0932eba8f0760a8ec0776f37fe0bb7ee31420

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