Malicious PDF — malware analysis report

Static analysis result for SHA-256 a363729660a89582…

MALICIOUS

PDF

75.4 KB Created: 2021-03-14 04:59:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: b473605f9547036fc56346a763236d26 SHA-1: e0269b0088149c8690c431ab7370dadb82cb7423 SHA-256: a363729660a89582ab354ab96994a02635148b2fd330b96990e15104a82e0ae4
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting it functions as a link farm or phishing lure. The embedded URLs point to various domains, some of which are associated with disposable hosting, further supporting a malicious purpose. No scripts were extracted, but the PDF structure itself is designed to redirect users to potentially harmful external sites.

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://seumenha.ru/wix?keyword=practical+arts+examples PDF link annotation
    • https://wufirojotuxo.weebly.com/uploads/1/3/1/3/131398242/ratodovefoba_xusodani.pdfIn PDF document text
    • https://kemebawe.weebly.com/uploads/1/3/5/3/135313751/d8199aec.pdfIn PDF document text
    • https://merogowaxoku.weebly.com/uploads/1/3/1/0/131069891/sumetewid-bolapokarepugi-libodeguzonaro.pdfIn PDF document text
    • https://bilobusi.weebly.com/uploads/1/3/4/8/134872308/367fea3f374.pdfIn PDF document text
    • http://dulexip.22web.org/31716094588.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/76ba7561-3262-4929-8b83-a04ec34492b5/kilozijidedelajuvin.pdfIn PDF document text
    • https://b3dfd9c9-1030-471f-a26d-814ea73dbccc.filesusr.com/ugd/d97afa_77277a9136a5485791943cc4116fe0fe.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfd69c51-4719-4380-bdd7-633ac7713774/calculo_integral_conamat_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/zinemalog.pdfIn PDF document text
    • http://rolozaj.epizy.com/54580463439.pdfIn PDF document text
    • https://200c4c3d-185b-4246-b99f-f40cd7065c99.filesusr.com/ugd/3ed902_685261c184ae4302b979febe7148791e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ligole/look_whos_back_ending_song.pdfIn PDF document text
    • https://1639490a-f715-481e-9fb1-af38d332269b.filesusr.com/ugd/a59130_a7e3d4737b4940d383d1f58d006e27db.pdf?index=trueIn PDF document text
    • http://balubusepebibi.rf.gd/android_emulator_wikipedia.pdfIn PDF document text
    • http://revuzulikasulo.epizy.com/jandy_salt_system_error_code_145.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/157e3d63-292c-402a-a42e-2281f14782e4/zimusesokufizusixivubeko.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_off0000eb62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB62 5148 bytes
SHA-256: 7010e8afc41175fe70e173c5b41c6df26ad323cd2eca00eac838c99437dab67b
font_01_sfnt_off0000fcd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD3 10572 bytes
SHA-256: d1b699fcfa1c554244cb0be4954db98feff5d78f27aa133090fea2e580f2201d

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