Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e0b577161f5ca79…

MALICIOUS

PDF

83.8 KB Created: 2021-04-09 07:51:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 68019044cd80be7d38a8d0c080e948a6 SHA-1: d6c402ade06c299a0df9a8e9db019ca5e1a15680 SHA-256: 0e0b577161f5ca79f32aa1a3700ef025f5104f2502f7191b7e0eb2676cf8514d
186 Risk Score

Malware Insights

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

The PDF document contains a link farm with numerous disposable domains, designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://ponafet.ru/strik?utm_term=pokemon+trading+card+game+sun+and+moon+booster+pack PDF link annotation
    • https://kutekedutowake.weebly.com/uploads/1/3/4/6/134635623/d7bbda8d30d.pdfIn PDF document text
    • https://susejovidexoxi.weebly.com/uploads/1/3/0/7/130775922/jejakop-fovemejasib.pdfIn PDF document text
    • https://cdn.sqhk.co/noruwotil/geigj12/xavis.pdfIn PDF document text
    • https://sozizupisez.weebly.com/uploads/1/3/1/8/131872239/77eb2a3729.pdfIn PDF document text
    • https://xudapunazegiwav.weebly.com/uploads/1/3/2/7/132741045/gipoduwonid-jilafifiza-vegiwibikafiwoz-pabijalixab.pdfIn PDF document text
    • https://toxekemugig.weebly.com/uploads/1/3/4/4/134484635/85901.pdfIn PDF document text
    • https://koterevimudo.weebly.com/uploads/1/3/4/3/134342185/14a6883.pdfIn PDF document text
    • https://cdn.sqhk.co/kabawamurelo/03h8hbd/bluffton_sc_accommodations.pdfIn PDF document text
    • https://cdn.sqhk.co/jimumakevaji/hdSiexq/background_video_recorder_app_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwiketi/MLmjigj/hachi_hachi_camden_ar.pdfIn PDF document text
    • https://cdn.sqhk.co/xufaribo/chbhagf/magic_piano_pink_tiles_apk_mod.pdfIn PDF document text
    • https://tebojejuket.weebly.com/uploads/1/3/4/7/134764489/80744846a2298a8.pdfIn PDF document text
    • https://noduxexoretan.weebly.com/uploads/1/3/5/9/135993764/1538694.pdfIn PDF document text
    • https://pudevadiketimim.weebly.com/uploads/1/3/4/6/134606785/nuxomimoxaxi.pdfIn PDF document text
    • https://cdn.sqhk.co/pomorezolo/N3tKoib/8958738959.pdfIn PDF document text
    • https://lexojonogi.weebly.com/uploads/1/3/4/3/134315697/8708778.pdfIn PDF document text
    • https://gajegebukorivip.weebly.com/uploads/1/3/4/4/134487765/gubuperakukidusave.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c31d65df-273c-4bcc-acfb-7b03b0724b99.filesusr.com/ugd/e7e4a0_6f5b9ef131634e188511e301d3b577e9.pdf?index=trueIn PDF document text
    • https://538d8494-0c7d-401a-b890-0485f6bc7bca.filesusr.com/ugd/29c71c_ac103c301cd94012bee093a9be72ac63.pdf?index=trueIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001238c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1238C 18464 bytes
SHA-256: b3d2e03138acbe09a1a55709ade3956cf2c88ca51784bf7f028d7847c833e5ce
font_00_sfnt_off0000edab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAB 5568 bytes
SHA-256: 403098c98a6af8bd33c07f1ead147f45e18a1b3e1698ec7dcf01f006ec3acc7c
font_01_sfnt_off00010084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10084 10220 bytes
SHA-256: 0810331a56f5d2d4dfad8654b50c2561108d41253b13a544e9ffc9382b53ab21