Malicious PDF — malware analysis report

Static analysis result for SHA-256 13e9ce5ed7ad22f3…

MALICIOUS

PDF

83.7 KB Created: 2021-05-18 02:41:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b56a4bb0b0ebd0af3ee6a7ea4d1d5493 SHA-1: 226b2d29dd7f432f294e2d9f30ce1440f1b360b5 SHA-256: 13e9ce5ed7ad22f395a8badbdedc2091ca371a3337e06c868c44d5dfd78fb526
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting services, indicating a link farm or redirection scheme. The embedded URL 'https://botokaw.ru/strik?utm_term=how+to+set+casio+edifice+watch+5177' suggests a lure to a potentially malicious site. ML and ClamAV detections confirm the malicious nature of the file, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://botokaw.ru/strik?utm_term=how+to+set+casio+edifice+watch+5177 PDF link annotation
    • https://dobakilulujafej.weebly.com/uploads/1/3/7/5/137507855/4421783.pdfIn PDF document text
    • http://tuwosip.iblogger.org/how_do_you_explain_christianity_to_a_nonbeliever.pdfIn PDF document text
    • https://lasezafokovopar.weebly.com/uploads/1/3/5/2/135294620/5636186.pdfIn PDF document text
    • https://naxomusiji.weebly.com/uploads/1/3/1/6/131606859/0f18d52.pdfIn PDF document text
    • https://xixemoxutosiseg.weebly.com/uploads/1/3/4/4/134473276/1954fdeaefe.pdfIn PDF document text
    • https://jetasiduneka.weebly.com/uploads/1/3/4/5/134586997/032d1b3d2fce2b.pdfIn PDF document text
    • https://divojalu.weebly.com/uploads/1/3/4/6/134664609/654851.pdfIn PDF document text
    • https://fodonisegijiwos.weebly.com/uploads/1/3/1/4/131437376/ligudogawazolid.pdfIn PDF document text
    • https://saselafe.weebly.com/uploads/1/3/4/8/134894966/72425aea302a.pdfIn PDF document text
    • https://paleforekirito.weebly.com/uploads/1/3/4/5/134579508/d8b2f05935.pdfIn PDF document text
    • http://baxutuji.22web.org/askep_post_op_hernia_inguinalis_lateralis.pdfIn PDF document text
    • https://lewubudakaxawo.weebly.com/uploads/1/3/4/3/134342842/3208305.pdfIn PDF document text
    • https://tivavazo.weebly.com/uploads/1/3/5/3/135337759/3a79b84827c.pdfIn PDF document text
    • https://dugeditukuvil.weebly.com/uploads/1/3/4/7/134723955/5237a56b4f03efa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/ac0db0d9-8db6-4891-b0f6-289aa46e12d3/hamlet_william_shakespeare_summary_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db3487d0-7adb-45f4-b4bb-5e43c710c13d/muvuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c3710d7-c2cc-4a57-a2e2-eada76dd5275/donadokulorafudununolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0556e947-9211-4215-a660-6014ab1d9ec0/zogotufasetaruwonit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22c3725c-69cb-46f0-a5f7-0008464cecd2/rosario_a_la_preciosa_sangre_de_jesucristo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b24476a9-c873-4167-ba9f-d08f1b5c2cab/die_unendliche_geschichte_soundtrack_remix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad817385-5885-467d-bfa3-ac7ab892f027/how_to_determine_overall_gre_score.pdfIn PDF document text
    • http://gelotamarabi.epizy.com/autismo_diagnostico.pdfIn PDF document text
    • http://jofufabebeboxur.rf.gd/medical_certificate_for_job.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0060f39-01d7-4739-8ff7-dbfe6b4c8ed0/dedadulegulegatex.pdfIn PDF document text
    • http://kexeban.rf.gd/endless_space_2_lumeris_guide_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcbf292e-db95-4c41-8d56-e43ead497e1a/tanorosukategeka.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fadf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADF 4972 bytes
SHA-256: a4c125d36ed4551a6025b0071ba17df0269c3a072a7e03157918da8eca8712bb
font_01_sfnt_off00010bf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF9 10864 bytes
SHA-256: f132e368b7dd2378f4916fc12f8dc082290f7ea85792db6adab3af9ffd5b0f5c
font_02_sfnt_off0001310c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1310C 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333