Malicious PDF — malware analysis report

Static analysis result for SHA-256 e235e3ea34a09530…

MALICIOUS

PDF

67.6 KB Created: 2021-03-15 00:09:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3f62cb507a1d25c68af4056c010aa781 SHA-1: 9b69c5bdf64dc05614c5fad4bc6c54533065717d SHA-256: e235e3ea34a095303e4b171d2745f1f935838fd96a52980488c5f5391048e304
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xajibur.ru/award?keyword=perbedaan+emfisema+dan+bronkitis+kronis+pdf PDF link annotation
    • https://ripaduwik.weebly.com/uploads/1/3/5/3/135311581/fb4905.pdfIn PDF document text
    • https://dunofedipusafo.weebly.com/uploads/1/3/4/4/134477286/053aededc.pdfIn PDF document text
    • https://xiletepegokif.weebly.com/uploads/1/3/4/3/134319576/jokufisuxudos.pdfIn PDF document text
    • https://cdn.sqhk.co/boxewemutox/lGjD4OU/cesarean_dictation_template.pdfIn PDF document text
    • https://cdn.sqhk.co/bivadudit/jnidhb1/assistant_director_jobs_los_angeles.pdfIn PDF document text
    • http://jotetimaral.22web.org/64839512073.pdfIn PDF document text
    • http://migazezi.iblogger.org/78533086440.pdfIn PDF document text
    • https://kuzeloxowew.weebly.com/uploads/1/3/4/3/134330257/kagipunosa.pdfIn PDF document text
    • https://zowemuxojawoput.weebly.com/uploads/1/3/4/3/134357794/ce3870e8.pdfIn PDF document text
    • https://cdn.sqhk.co/rugofufol/geggijl/biker_mice_from_mars_toys_vinnie.pdfIn PDF document text
    • http://gabutetidik.22web.org/507_assignment_1_answer_in_tamil.pdfIn PDF document text
    • http://filexupop.iblogger.org/the_giver_ch_6_questions.pdfIn PDF document text
    • https://mamapesuwilataj.weebly.com/uploads/1/3/4/8/134857931/9d8ff829.pdfIn PDF document text
    • https://numojenemisuben.weebly.com/uploads/1/3/2/3/132303045/f6f3d95150a179d.pdfIn PDF document text
    • https://pitubesisimebi.weebly.com/uploads/1/3/2/6/132681325/muzolud_fejononegavog.pdfIn PDF document text
    • https://vonufire.weebly.com/uploads/1/3/4/5/134596457/biwedesuxotakig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wofukisunoxo.epizy.com/antibiotic_surgical_prophylaxis_guidelines_2012.pdfIn PDF document text
    • http://tekobisami.rf.gd/dabitarifip.pdfIn PDF document text
    • http://notewewagegev.rf.gd/jefevef.pdfIn PDF document text
    • http://gukisika.rf.gd/jipajavubebewoba.pdfIn PDF document text
    • http://zuwosopawekaz.rf.gd/68402930174.pdfIn PDF document text
    • http://guvivewemubalef.epizy.com/rutupu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB43 5360 bytes
SHA-256: 63fad5b3b71dbd982369ba182c4afadef31665ee51f3fb257ff7991bd1a8c888
font_01_sfnt_off0000dd64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD64 10504 bytes
SHA-256: db7fdfec77cee1c624510d152d00412e5197ef8b998039f405e71749d7fddd01

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