Malicious PDF — malware analysis report

Static analysis result for SHA-256 946e9df7ad90f18a…

MALICIOUS

PDF

71.2 KB Created: 2021-02-18 03:45:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 30937f7687d76e762bc0b18dfdb8f7ec SHA-1: 62b6c8307c5b9d08160fbc3f938c6a2ef0abaa48 SHA-256: 946e9df7ad90f18a170e6c22a682989110f5e456fdfa4f5963d87211dbfe39df
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to benign-looking PDF files, suggesting a link farm or SEO poisoning tactic. The primary URL, https://jottigo.ru/123, is presented as a troubleshooting guide, likely a lure to a phishing or malware distribution site. ClamAV detection as Pdf.Phishing.Trojan further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://jottigo.ru/123?utm_term=briggs+and+stratton+675+series+pressure+washer+troubleshooting PDF link annotation
    • https://wilasumoleliwu.weebly.com/uploads/1/3/1/4/131414134/radebodevamuvi.pdfIn PDF document text
    • http://tolizidusinakil.22web.org/the_crucible_act_2_movie_study_guide.pdfIn PDF document text
    • https://vususutuf.weebly.com/uploads/1/3/4/6/134634118/xejamodedafadolefoz.pdfIn PDF document text
    • https://gamevuwi.weebly.com/uploads/1/3/4/5/134525912/gusowe_doxed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jemibare.epizy.com/nafaritamowox.pdfIn PDF document text
    • http://fejusadifidexi.epizy.com/attestation_de_travail_cdi.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/the_hut_six_story_breaking_the_enigma_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/22982721252.pdfIn PDF document text
    • http://suvoxezol.rf.gd/98014581564.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/bidding_process_for_construction_projects.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/jukog.pdfIn PDF document text
    • http://xaramoturowuf.rf.gd/bc_speculation_tax_form_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/gatazeromij/medical_terminology_for_health_professions_8th.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/nukolinomapeg.pdfIn PDF document text
    • http://govatojajij.epizy.com/worazuxojajevak.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/english_songs_app_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/asrb_ldc_recruitment_2016.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_off0000d698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD698 5860 bytes
SHA-256: 4fe21428d57a913c7cb7024d42fce4f7d1343414fe4aeb10fe675864ad4f45b6
font_01_sfnt_off0000ea9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9A 10832 bytes
SHA-256: 1997fa0add56b7f83b626f5605341a53dac74e61ed23e2df1bed10aa9cc386c7

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