Malicious PDF — malware analysis report

Static analysis result for SHA-256 35b784f45fca67e0…

MALICIOUS

PDF

75.0 KB Created: 2021-02-19 17:46:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 44ed6e93ed4b2d4dd2244052979e8d9f SHA-1: 2cd066b1fec6e34bdb4b384db837094269795848 SHA-256: 35b784f45fca67e00c9c166457e38a22312dc8c0b049a937a9dddd7740821292
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'baarspo.ru' and another to 'jofanemapax.epizy.com', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a tactic of using multiple disposable domains for link farming, further supporting a malicious intent.

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 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/123?utm_term=unfair+labour+practice+in+south+africa+pdf PDF link annotation
    • https://cdn.sqhk.co/foroboreb/haa0Blp/87783121036.pdfIn PDF document text
    • http://kifemefojobamu.22web.org/lagu_bidadari_tak_bersayap_midi.pdfIn PDF document text
    • https://cdn.sqhk.co/jupufopil/gdjcALR/used_mini_ninja_motorcycle_for_sale.pdfIn PDF document text
    • https://vafopizinenited.weebly.com/uploads/1/3/4/4/134480139/deter.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414500/normal_60000501ba75b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444356/normal_601f20c9b4c35.pdfIn PDF document text
    • http://fisuruwibowin.66ghz.com/vlookup_multiple_criteria_google_sheets.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402720/normal_601fb1fa12b94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369907/normal_6007313a9f792.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
    • http://jofanemapax.epizy.com/jijotipume.pdfIn PDF document text
    • http://pofumitiko.epizy.com/90198442543.pdfIn PDF document text
    • http://tesoxukezeziles.epizy.com/vorobiwenigugimebite.pdfIn PDF document text
    • http://gefetela.epizy.com/jenn-_air_dishwasher_jdb-_5_installation_guide.pdfIn PDF document text
    • http://kumobeba.epizy.com/97097401718.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/cyanogenmod_installer_per_android.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD921 5256 bytes
SHA-256: b7e66db66ea8c13d6a5d75fac79b29cc38489cd85c4031ab1b079696acef31aa
font_01_sfnt_off0000eae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE8 10700 bytes
SHA-256: ab6eafb3acaa6b7c27fa50e94fdab7862bbab74b5da5416d955b95c6119a69b1
font_02_sfnt_off00010eb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB9 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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