Malicious PDF — malware analysis report

Static analysis result for SHA-256 e575cceea4fb1350…

MALICIOUS

PDF

77.4 KB Created: 2021-02-28 18:38:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c12ec7e044ba1602b362740570d9dd50 SHA-1: 65be4faec56528e6a5a70f734708f6f4944534d5 SHA-256: e575cceea4fb1350a4d6e2014bba2f8b6e931c1470c8457720c9388332ceb0a1
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, with many hosted on disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

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://xezojetit.ru/wix?keyword=food+chain+questions+worksheet+answers PDF link annotation
    • http://lololoj.sportsontheweb.net/92790808494.pdfIn PDF document text
    • http://modozadubop.mywebcommunity.org/leica_m6_for_sale_australia.pdfIn PDF document text
    • http://latuha.com/29142194112xzzk9.pdfIn PDF document text
    • https://xebagamalod.weebly.com/uploads/1/3/1/3/131383607/gedijevokagit-raruzinebewil-vaker.pdfIn PDF document text
    • https://simokatojerosu.weebly.com/uploads/1/3/0/8/130874490/zanoxanugisoxaze.pdfIn PDF document text
    • https://lufuneliza.weebly.com/uploads/1/3/2/6/132682735/e5fd5ce117890.pdfIn PDF document text
    • http://ravigimojamel.mypressonline.com/rca_5_disc_cd_player_not_working.pdfIn PDF document text
    • https://paporese.weebly.com/uploads/1/3/1/0/131071113/remugotoja.pdfIn PDF document text
    • http://tuwukadinem.mygamesonline.org/fundamentals_of_database_systems_by_elmasri__navathe_ppt.pdfIn PDF document text
    • https://tuledekubixa.weebly.com/uploads/1/3/4/7/134722649/nepupe.pdfIn PDF document text
    • http://fadulifakibul.medianewsonline.com/dowodujarugukibugami.pdfIn PDF document text
    • https://wufipalowev.weebly.com/uploads/1/3/4/5/134595621/4847747.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vebusatoro.atwebpages.com/ninja_smoothie_blender_instructions.pdfIn PDF document text
    • http://jokosen.atwebpages.com/how_long_does_it_take_to_learn_matlab.pdfIn PDF document text
    • http://feferabi.atwebpages.com/4973271215.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_off0000f3be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BE 5232 bytes
SHA-256: 21e107965733573585d76aa540ee7e571af758135699076a84267e2fdb313695
font_01_sfnt_off00010591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10591 10148 bytes
SHA-256: a70e4b5747578022a71e9a224ed29f7cdaed2988af530f3c47cce0b425ba2aa5

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