Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dc5a64c571b0ccd…

MALICIOUS

PDF

81.2 KB Created: 2021-04-04 12:03:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 13a362aea88686b8be4f65cdc10e9ad5 SHA-1: e48f2849b362602a4b9b63d12fa3f219380ff88d SHA-256: 4dc5a64c571b0ccd6f28e838a3858c97fc1ad8ee4878bca0d4642eb3398d8873
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting services, indicating a link farm or SEO spamming operation. The presence of a URL with a 'film' query parameter suggests a lure to attract users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/123?utm_term=film+angling+darma+full+movie PDF link annotation
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/xaberuxofupuwezi.pdfIn PDF document text
    • https://pujuwofox.weebly.com/uploads/1/3/4/8/134882524/lijigobapiv-gumafepalidebi-fopikirom.pdfIn PDF document text
    • https://zokefipevi.weebly.com/uploads/1/3/4/3/134311683/e2392d0cba932f.pdfIn PDF document text
    • http://tapadobav.iblogger.org/vufusipiwelezorut.pdfIn PDF document text
    • https://mabavelege.weebly.com/uploads/1/3/0/7/130775551/kuwewim.pdfIn PDF document text
    • http://requiremcgood.com/xuwisekobigonidapelefmvomu.pdfIn PDF document text
    • http://libralab.digital/31074438470mrjzq.pdfIn PDF document text
    • https://galujamisone.weebly.com/uploads/1/3/1/8/131871568/bdd03e2a6e0368e.pdfIn PDF document text
    • http://meetsalle.xyz/88672336336wfcq7.pdfIn PDF document text
    • http://koreanluxe.com/13733864900ndy78.pdfIn PDF document text
    • https://fozujivopaj.weebly.com/uploads/1/3/5/3/135303700/3055603.pdfIn PDF document text
    • http://getveran.site/marvel_comics_free_downloadvwzgr.pdfIn PDF document text
    • https://wabelurotetef.weebly.com/uploads/1/3/4/6/134693048/5303076.pdfIn PDF document text
    • https://xuvivodoxanujo.weebly.com/uploads/1/3/5/3/135308848/261c5b2a.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://vivijar.epizy.com/peluboxuvifelufelolexuf.pdfIn PDF document text
    • https://f635e5d9-31b1-4f19-b758-7a623be10181.filesusr.com/ugd/6cf0f5_8ed62478a2fb4d9cbca8f7f5cc48131a.pdf?index=trueIn PDF document text
    • http://nuridoxiwe.rf.gd/atlas_copco_ga37_compressor_manual.pdfIn PDF document text
    • https://fea50346-ab34-4b67-843e-90a6383c4983.filesusr.com/ugd/bf678e_dac49f88dbc04609b831e899da18f584.pdf?index=trueIn PDF document text
    • http://datifuvuk.epizy.com/luwupagifilagasisegaxirok.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_off0000f4e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E6 4868 bytes
SHA-256: cd30e2ccdca0101a7e5a7798bea935bbe76b8b6951435a90cab4e72f345fad04
font_01_sfnt_off0001054c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054C 10652 bytes
SHA-256: 4afa0c94258782c3e059021f307a2278327aa528d0b4b6a0aa27adb52240a0f1
font_02_sfnt_off000129a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129A7 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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