Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2075b7dcc3e75cc…

MALICIOUS

PDF

74.1 KB Created: 2021-02-18 19:33:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9cbba148d69d0456cf732525f13f7ff2 SHA-1: 1190983f5c14c4e55d776f714adc6ef1bc10ca47 SHA-256: a2075b7dcc3e75cc293d9a30ece6bfba473d62628e78bc0c032ebcc83a1c2525
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many pointing to disposable domains and redirectors, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were extracted, the structure and URL patterns are strongly indicative of a phishing or malware distribution campaign.

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
  • 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 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.
  • 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://crophysi.ru/aws?utm_term=ram+dass+becoming+nobody+review In PDF document text
    • http://finansi-7.online/360_performance_appraisal_definitionpakjy.pdfIn PDF document text
    • https://bomovote.weebly.com/uploads/1/3/5/3/135398027/2238801.pdfIn PDF document text
    • https://cdn.sqhk.co/kafufojugure/Pjjicjj/stickman_legends_warriors_shadow_war_mod_apk.pdfIn PDF document text
    • https://pozufijuxib.weebly.com/uploads/1/3/0/7/130775557/3cf1d5.pdfIn PDF document text
    • https://cdn.sqhk.co/womawuxinuge/htsgeii/ben_10_alien_run_game_video.pdfIn PDF document text
    • https://cdn.sqhk.co/jofutagi/Qjcahkp/13427384662.pdfIn PDF document text
    • https://vamawawu.weebly.com/uploads/1/3/0/8/130874524/ruvaxajomebumogaw.pdfIn PDF document text
    • https://baxawomegofagu.weebly.com/uploads/1/3/2/8/132815114/wixufe.pdfIn PDF document text
    • http://majelogajizivo.iblogger.org/jalesar_weather_report_today.pdfIn PDF document text
    • https://tunuwadubozowe.weebly.com/uploads/1/3/4/3/134363043/tuvukeritiloku.pdfIn PDF document text
    • https://supeneti.weebly.com/uploads/1/3/2/8/132815050/zomisunonir_mozez.pdfIn PDF document text
    • https://kuvezuwuziteb.weebly.com/uploads/1/3/4/3/134388010/7800636.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sizokipizap.rf.gd/7312462518.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/2013_chevrolet_impala_lt_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/ashland_ohio_weather_report.pdfIn PDF document text
    • http://wuzorijo.rf.gd/36115884672.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/best_blues_songs_of_all_time.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_off0000e2e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E2 5628 bytes
SHA-256: 26f38a26c653a6e9a80a00e2603b45a40ca3523e62b75d0c435127ca3fed53a0
font_01_sfnt_off0000f60c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60C 10996 bytes
SHA-256: 7b5c30a138cc34f8acb9c3ae63265f9f892812982aeacd0592a6841ec139c301

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