Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a6d40fc7e2cc463…

MALICIOUS

PDF

71.6 KB Created: 2021-06-02 16:16:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 39e663b140ef90c411685e0dac400686 SHA-1: 10d1441cee69dfdebadacec538bd195929f2b6ea SHA-256: 2a6d40fc7e2cc4634c6722a8b828663577f7e6a69561e83c7a13135e4baededa
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://kuzutuzo.ru/123?utm_term=bad+genius+full+movie++online PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4401732/normal_602239aeed442.pdfIn PDF document text
    • https://zigamebujadosa.weebly.com/uploads/1/3/4/7/134745820/nabizefoxos.pdfIn PDF document text
    • https://lasunawinifomun.weebly.com/uploads/1/3/4/3/134385524/807741c35d3d01.pdfIn PDF document text
    • https://sozazisoxiz.weebly.com/uploads/1/3/4/4/134463449/risavetuj_pafosenevu_sisewugudotabe.pdfIn PDF document text
    • https://piberarejini.weebly.com/uploads/1/3/5/3/135332679/31502f1f46fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471711/normal_6059162e48d0c.pdfIn PDF document text
    • https://desivisigoxup.weebly.com/uploads/1/3/4/6/134681557/ad4eaca1854.pdfIn PDF document text
    • https://xemaxokiba.weebly.com/uploads/1/3/4/3/134350412/nipubawovomon_zisire_vawovade_tekuwigeja.pdfIn PDF document text
    • https://nezogifoxo.weebly.com/uploads/1/3/1/6/131637357/tobopus_tenoxodanabesa_bojasugiber_rawuluzif.pdfIn PDF document text
    • https://gizafagubezuz.weebly.com/uploads/1/3/5/3/135321184/2ad07e.pdfIn PDF document text
    • https://rigitugatelimo.weebly.com/uploads/1/3/4/1/134131632/kujukukegositi.pdfIn PDF document text
    • https://garixapevawena.weebly.com/uploads/1/3/4/4/134495328/8786083.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475406/normal_604d24acba9e1.pdfIn PDF document text
    • https://liritetujom.weebly.com/uploads/1/3/5/3/135310948/3775379.pdfIn PDF document text
    • https://lotopunukulel.weebly.com/uploads/1/3/4/4/134473418/kedobas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gepefupugalu.pbworks.com/f/sepikavobil.pdfIn PDF document text
    • http://tazijebep.pbworks.com/f/lezuxabisifoge.pdfIn PDF document text
    • http://supatibu.pbworks.com/w/file/fetch/144428961/vurituxegujifegitubifu.pdfIn PDF document text
    • http://jesababa.pbworks.com/f/wifi_hacker_pldt_apk_free_download.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD746 5240 bytes
SHA-256: 61208c94689c750875e00d69becf4356e86cf1e5f4440392ba359eb362a2385f
font_01_sfnt_off0000e919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE919 11280 bytes
SHA-256: 1eac1cc3a22abc4bf49349a374422be6a3a5d9e9b4f97bc36fc93a71d9b86652

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