Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d162d1c7c528d39…

MALICIOUS

PDF

73.2 KB Created: 2020-12-03 05:40:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: b8d66999d812f1a48ebdac172a22e773 SHA-1: de0d4cff054af82e325fae4984957ef430180fe2 SHA-256: 2d162d1c7c528d39a83e73cf139fe13ab827d029fe195a204dd85cc2c019e4e2
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?utm_term=ken+kaneki+mask+tattoo In PDF document text
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/480dcc2c9f4e06.pdfIn PDF document text
    • https://juwimifabofif.weebly.com/uploads/1/3/4/3/134369341/e02283dd85523.pdfIn PDF document text
    • https://dinurafilaxu.weebly.com/uploads/1/3/4/6/134621410/a7a4264.pdfIn PDF document text
    • https://kirugivedipabaw.weebly.com/uploads/1/3/4/4/134464293/nakuli_tuvavidatogu_tunerifuvevup.pdfIn PDF document text
    • https://lijupumo.weebly.com/uploads/1/3/4/4/134496400/jowekefib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe328d9d79364840591983/1606300303750/82107328617.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/quran_in_english_download.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/abhiman_bengali_movie_song_320kbps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7f58fb7-2ef7-4d11-86d7-433ceb63e65c/50336348332.pdfIn PDF document text
    • https://s3.amazonaws.com/zagubip/97160206865.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/bitcoin_miner_android_github.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/7705336043.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2c4ca20-d0fc-4a63-a819-e00522b30327/vuserinenusudafewejelixu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7169c00-7137-4f31-841a-b3ba39fbff32/8th_commandment_lyrics.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_off0000d7ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7CA 3220 bytes
SHA-256: a70ad42a384161cfa8440ebdf23a60c654cb0c2c29c78bb0540e475cc983669f
font_01_sfnt_off0000e343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE343 4736 bytes
SHA-256: c3b7f5e9c7ecbf6e4e7264e05b90b332cea201544e9452221fdc694aef5cc900
font_02_sfnt_off0000f350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF350 10716 bytes
SHA-256: 9c20ca59192cb4c0974f324b28b63c4e0013a62fb3f0cb83d20d731cbc8568d0

Open this report in the interactive analyzer, or submit your own file for analysis.