Malicious PDF — malware analysis report

Static analysis result for SHA-256 26605ebaebe19bc5…

MALICIOUS

PDF

73.2 KB Created: 2021-03-17 19:27:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 45955c8b4c5a73a09d414c070622d5e4 SHA-1: 2b50db12c68cc66a9320443046c608449011d5af SHA-256: 26605ebaebe19bc5e94c1ad543d8ca8f9fdfff2696561c9224538614de8f4989
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 high likelihood of malicious intent. The PDF contains numerous external URIs, with at least one pointing to a suspicious domain ('baarspo.ru') and another to a link farm hosted on disposable domains, suggesting a phishing or malware distribution scheme. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest it's designed to redirect users to malicious content.

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://baarspo.ru/strik?utm_term=sa+sports+fever+crossbow+parts PDF link annotation
    • https://rolivexume.weebly.com/uploads/1/3/0/8/130873784/gaxalegada_wireliru_botebenitare.pdfIn PDF document text
    • https://cdn.sqhk.co/mexovaru/MYigbO8/walmart_inventory_management_software.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460042/normal_601b396470571.pdfIn PDF document text
    • https://rojuligu.weebly.com/uploads/1/3/0/9/130969709/2064183.pdfIn PDF document text
    • https://xakirajurupani.weebly.com/uploads/1/3/2/3/132303083/noveroke-gowazex-nudujo-seroponam.pdfIn PDF document text
    • http://wozufilugud.iblogger.org/bisoxisijenuwefowat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489725/normal_5fe25a56a67b7.pdfIn PDF document text
    • https://dolevomebebozap.weebly.com/uploads/1/3/1/6/131636651/883936.pdfIn PDF document text
    • https://gererojakomez.weebly.com/uploads/1/3/1/1/131163960/a2e2a84c93d.pdfIn PDF document text
    • https://cdn.sqhk.co/zetobazox/iiyhf3Z/idle_tuber_empire_hack_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/nemuvefik/oqjhjg2/lemevigudugigajofax.pdfIn PDF document text
    • http://tuxosuzarug.iblogger.org/fikawezixokewowudo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454299/normal_5ffb6669ac084.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolaseja/f16kPhc/27846071369.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/245f221a-fc23-464c-8a54-e1e5e6988070/wixino.pdfIn PDF document text
    • http://xefumejar.rf.gd/how_to_write_a_research_essay_on_a_novel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32ab5b3e-cea0-4af6-8acf-da467440e777/gisotinixikijo.pdfIn PDF document text
    • http://padenijuwike.rf.gd/sexidot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/059fd8f6-b5d6-43db-845a-c65cf6f23cb2/creative_writing_prompts_for_books.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_off0000e06e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06E 5372 bytes
SHA-256: cc2f8b030e2d7a7f87f8eb90664f62e4229e0b593ab0b431a73989c6fbc41501
font_01_sfnt_off0000f2d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D5 10128 bytes
SHA-256: f93839780c3d15a0631c34474abbe85cc4563cc3328672ccac2d41aedd1aec82

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