Malicious PDF — malware analysis report

Static analysis result for SHA-256 044db4ad56ada5bd…

MALICIOUS

PDF

76.2 KB Created: 2021-03-14 17:20:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e2eedaf919a9bbe83dd76a86386ae644 SHA-1: 57114fef8d0177ab82cbf711064fe7db6ef31526 SHA-256: 044db4ad56ada5bd99a17865afd0fd0f5b0a4119925971f9976a2aa9a8c7160f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself is indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://druttle.ru/award?keyword=creepshow+comic+pdf PDF link annotation
    • https://falibapop.weebly.com/uploads/1/3/3/9/133997194/suxoxapifinope.pdfIn PDF document text
    • https://cdn.sqhk.co/nixibaraje/djjjcSW/bemanager_be_a_soccer_manager_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/zimuteraf/ijw9UqC/68267846543.pdfIn PDF document text
    • http://instasale.company/magedobasosandtfw.pdfIn PDF document text
    • https://suzuxagutif.weebly.com/uploads/1/3/4/3/134352905/suxes.pdfIn PDF document text
    • https://jikodidujur.weebly.com/uploads/1/3/5/3/135319234/fagepepovovoxono.pdfIn PDF document text
    • https://cdn.sqhk.co/xefilelo/gZeygiq/with_heroes_idle_rpg_tier_list.pdfIn PDF document text
    • http://trenketo.buzz/kufizatakafocad1w.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://71b4061d-0fbe-47a8-a671-08758978b022.filesusr.com/ugd/0216f2_03b947bd721b4d45a3adbd41679fa469.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2babf7b4-e79e-4fc4-8183-4365903665d1/sozuzokuzitagamofo.pdfIn PDF document text
    • https://b133b025-67d1-4190-9e53-fbb99503dec2.filesusr.com/ugd/caf13f_de7fbccf10654cf4a3c0b0153dca85cc.pdf?index=trueIn PDF document text
    • https://34886cf3-15ed-44db-93e8-8979dc7c4cd7.filesusr.com/ugd/ea2c45_44eacd7c3d9147e7a868db5dce03a560.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/34666541-d96a-4e32-9d79-b50ddd97f743/timex_expedition_field_chronograph_amazon.pdfIn PDF document text
    • https://07e0a16e-b77d-475b-b724-88bbaedb347c.filesusr.com/ugd/8e9e2f_e6caa7a0731448ed8f33fcfbe4cf30cd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fff97d62-df47-4b72-8c5c-c6de1ff3e896/rulubizegesizelodower.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d237fd27-e260-4900-b7db-03fa48ab0f42/kangertech_evod_variable_voltage_1600mah_manual_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5433ea33-dd85-4f00-b0e4-e7cebd1ed35f/79113733379.pdfIn PDF document text
    • https://9db8f275-5044-409a-aa1b-3306d9dda9bd.filesusr.com/ugd/361f4b_64e2877b5228414db51570fcf478fe83.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8F 5152 bytes
SHA-256: 3ab660698257b837d44af8a1e60cd02f8f76eb0b7c825036e0fbc782a90e72c3
font_01_sfnt_off0000fefc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFC 10716 bytes
SHA-256: 73aead2095f5055c2f4d7f04c3ec49c30c3bbc429c0708109d244ba813450ed2

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