Malicious PDF — malware analysis report

Static analysis result for SHA-256 f67cc10aabd39dfd…

MALICIOUS

PDF

110.8 KB Created: 2021-02-16 09:55:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: db60e0b5165dc7f91011eee217851b0b SHA-1: 9e9462cecc00aa603d984057f519a6bb67535cc8 SHA-256: f67cc10aabd39dfd07a61c9446730b4ad71eefa996eff0f96814d56d18b3aff5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. It contains numerous embedded URLs pointing to disposable hosting and link farms, suggesting an attempt to redirect users to malicious sites. The PDF structure and embedded content are consistent with a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://druttle.ru/123?utm_term=what+are+the+four+main+purposes+of+punishment PDF link annotation
    • https://gibejeki.weebly.com/uploads/1/3/1/4/131438187/womala.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448346/normal_600f8c35aea31.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460946/normal_5ff084251bd6e.pdfIn PDF document text
    • https://rupogasonewu.weebly.com/uploads/1/3/4/6/134653860/9916173.pdfIn PDF document text
    • https://sizadomuwegemos.weebly.com/uploads/1/3/5/3/135335556/zijuvujuteduromod.pdfIn PDF document text
    • http://lnstagram-copyright-confirms.com/macmillan_english_worksheets_for_grade_7et429.pdfIn PDF document text
    • https://velaliwud.weebly.com/uploads/1/3/4/6/134644949/fonekezuzokuvuvu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415309/normal_5ff09d5cc2fcb.pdfIn PDF document text
    • http://itslm.fun/853835844878e0dp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428035/normal_5fe7695aa7132.pdfIn PDF document text
    • http://1xbet-sportstavki.fun/nuwuwetotiibp61.pdfIn PDF document text
    • http://saxamem.iblogger.org/gold_platform_shoes_70s.pdfIn PDF document text
    • http://tradestaroffice.com/bajirao_mastani_tamil_movie_free6ue2u.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://butexageteril.rf.gd/saunter_verb_forms.pdfIn PDF document text
    • http://xixovunutev.epizy.com/44876293726.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_off0001772d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1772D 5120 bytes
SHA-256: e268079d1ed06586cee8f5263a954a2c7587095ee70a8b5388ca888e6729f682
font_01_sfnt_off0001887a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1887A 10840 bytes
SHA-256: 208ea4f2c774a69e42ea056e84696679f1d680179285e67a83e1d972be341ace

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