Malicious PDF — malware analysis report

Static analysis result for SHA-256 95972c62328b8b8d…

MALICIOUS

PDF

77.7 KB Created: 2021-06-05 15:22:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a07250ee52dab5654742e45273e591b6 SHA-1: b2baccca6c45968efcdfd8f1e0185d2fafd004f9 SHA-256: 95972c62328b8b8dcf78023fc9078a11a6a989deb5d56f96a54f9bacd33a24d4
194 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting services, indicating a link farm or SEO manipulation tactic. ClamAV detection and ML classification strongly suggest malicious intent, likely related to phishing or distributing further malware. The embedded content, though heavily obfuscated, does not contain executable scripts but rather metadata and garbled text, reinforcing the interpretation of the document's primary function as a gateway to external malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://inwebjor.ru/pbw?utm_term=list+the+roles+and+responsibilities+of+a+sales+manager PDF link annotation
    • https://xadibepewi.weebly.com/uploads/1/3/4/4/134447443/6070887.pdfIn PDF document text
    • https://retedavaliloxi.weebly.com/uploads/1/3/5/3/135393755/darobovutegotor.pdfIn PDF document text
    • https://funujitumim.weebly.com/uploads/1/3/5/3/135347265/lizefaligejekebogo.pdfIn PDF document text
    • https://fotapudugibinok.weebly.com/uploads/1/3/4/8/134899903/7738542.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459060/normal_606e9a42e3b3d.pdfIn PDF document text
    • https://rimimasosonajis.weebly.com/uploads/1/3/2/6/132681992/xenero.pdfIn PDF document text
    • https://bagobizofenagex.weebly.com/uploads/1/3/4/7/134767931/butagiv-sibabuvifivutiv.pdfIn PDF document text
    • https://lavofimezifo.weebly.com/uploads/1/3/4/3/134341346/4104959.pdfIn PDF document text
    • https://zedifetizigofup.weebly.com/uploads/1/3/5/3/135393349/4993213.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471082/normal_600a90a55a2b0.pdfIn PDF document text
    • https://tipuxefisabe.weebly.com/uploads/1/3/4/8/134846761/6005691.pdfIn PDF document text
    • https://bodupakodekafas.weebly.com/uploads/1/3/2/6/132680796/sukiv.pdfIn PDF document text
    • https://lisubavami.weebly.com/uploads/1/3/4/3/134331762/2248e4b.pdfIn PDF document text
    • https://woliwejimagevin.weebly.com/uploads/1/3/4/3/134319070/dalutobasebujo_gadamisigom_rejafe.pdfIn PDF document text
    • https://dezuximoloxesar.weebly.com/uploads/1/3/1/4/131410685/9cafff2006dd5.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/2ee6c9e4-37b5-4a58-b951-b765f2f36a32/vupoxaxapuxive.pdfIn PDF document text
    • http://vibasuvezuz.pbworks.com/w/file/fetch/144569529/46557784929.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeaa399b-9839-451f-b5fb-2dd9c4c77238/cyberpunk_2077_frame_rate_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb4291a1-c0ed-4c12-a36a-a2e54b4912e4/black_and_decker_40v_trimmer_replacement_spool.pdfIn PDF document text
    • http://lakebimutep.pbworks.com/f/property_management_agreement_form.pdfIn PDF document text
    • http://kakewizajupe.pbworks.com/f/love_in_time_of_cholera_quotes.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_off0000f0c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C1 5536 bytes
SHA-256: 97012e5bf522a7c06d7779155963c1f6db0eff125fb8a967939f9ee211b3f35d
font_01_sfnt_off00010366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10366 11084 bytes
SHA-256: 44df0218dd942fe266287bc69fa7d49cbcce2cb8cad4fcc094e88817fd9044c1