Malicious PDF — malware analysis report

Static analysis result for SHA-256 a29f56e4a1a818b2…

MALICIOUS

PDF

68.3 KB Created: 2021-03-19 04:03:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac6788def5d5f958e771ad0b6d2b2fd3 SHA-1: d296aacd0443201b99889c9d0b6dd0930988155e SHA-256: a29f56e4a1a818b2ac5bce1ef172b62533d5f2d6fd7900ecab55989920139080
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of external links, suggesting a link farm or redirection mechanism to malicious sites. The embedded URI points to 'xezojetit.ru', which is likely part of the attack chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=tri+state+recovery+irvington+al
    • https://zesukixugedun.weebly.com/uploads/1/3/4/5/134593530/vixigujexove_gajajiwem_jogarunazovu_kupovuxumeva.pdf
    • https://piwirajaluz.weebly.com/uploads/1/3/5/3/135312697/gakofekir_gugekodoxolepew_morevi.pdf
    • https://cdn.sqhk.co/menidume/ijhbTHc/441094531.pdf
    • https://xijiruxexewige.weebly.com/uploads/1/3/4/7/134725886/645ae.pdf
    • https://lufojujerap.weebly.com/uploads/1/3/4/4/134481619/4181590.pdf
    • https://cdn.sqhk.co/baxewoxevum/eSgdhg7/74777197961.pdf
    • http://dabokopi.22web.org/the_adventures_of_tom_sawyer_and_huckleberry_finn_summary.pdf
    • https://zedumolubu.weebly.com/uploads/1/3/4/8/134862080/vunivifom.pdf
    • https://gixujadimi.weebly.com/uploads/1/3/4/7/134708567/1872027.pdf
    • https://motapesuna.weebly.com/uploads/1/3/4/7/134749044/baxiwonoxaxap_vepipitora_riderifuroxase.pdf
    • https://cdn.sqhk.co/lididiregi/hjwjigh/56322556152.pdf
    • https://cdn.sqhk.co/zibomevuguli/xpyjcvC/kexavu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dujoserowumil.epizy.com/xivilorajazaruwison.pdf
    • http://pogelejulogowev.rf.gd/15_day_weight_loss_challenge_day_4.pdf
    • https://uploads.strikinglycdn.com/files/c58d84ec-0312-449b-bf65-4d1bb57778d4/dell_latitude_d820_cpu_upgrade.pdf
    • https://8c805f22-5240-4a8e-9b4d-8499607ff1fc.filesusr.com/ugd/76156b_c441cab2ed844c14bac5c79167d0f688.pdf?index=true
    • http://wujoxuledod.rf.gd/gojukuvixoforovevazekelul.pdf
    • https://uploads.strikinglycdn.com/files/d4e85a0c-ce6e-4c8c-a7b0-b72d3f2e0ecf/la_divina_comedia_quien_fue_el_autor.pdf
    • https://2dcb0092-dd22-4cef-90c1-8c398f802bb7.filesusr.com/ugd/ff3115_5ec27ead2f42450298d4bbf25b579234.pdf?index=true
    • https://c8a164a7-2549-4056-b209-d27d417f800b.filesusr.com/ugd/136d3d_57ccb5781b38497bae35547f447d576b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/69116b8e-3e49-4bf7-98c3-06be5a1a054d/4782181437.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d003.bin
b781ed79359a79c12a429bd239cb703a7ea668366fa64aeeb1f89992fbef9c76		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD003 5080 bytes
font_01_sfnt_off0000e16e.bin
e513582761ce06fb52e20917fdfdcb620b3680903be3f462c87733828aaf4ff4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE16E 10112 bytes

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