Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0d17092354a7dc6…

MALICIOUS

PDF

70.3 KB Created: 2021-02-17 10:05:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2fb5fd47f9660081f1977a92062ac34a SHA-1: 4033333b1e8421d6670a2fe6a057a4d7462a4581 SHA-256: e0d17092354a7dc6beefec542c63b781eb90e27b2fab4a6b8e6c2dd1ef60228a
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to known malicious redirectors or disposable hosting, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly support its malicious nature. The primary function appears to be directing users to external, potentially harmful, content.

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/wix?keyword=k2+mountain+bike+zed+2.0 In PDF document text
    • http://dozixolabizije.iblogger.org/zasorobesivotodaleg.pdfIn PDF document text
    • https://dudunetexuzo.weebly.com/uploads/1/3/1/3/131379759/537002152b6.pdfIn PDF document text
    • http://rebituzugofebo.22web.org/video_player_android_no_ads.pdfIn PDF document text
    • https://ripukalogud.weebly.com/uploads/1/3/4/3/134391837/tunis_wubalagosibuji_lidafogap_sugitikirokuko.pdfIn PDF document text
    • https://cdn.sqhk.co/nirobipodev/1gjjhgh/netflix_movies_2020_comedy.pdfIn PDF document text
    • https://cdn.sqhk.co/pelotuwew/iaL7Kig/15200241343.pdfIn PDF document text
    • https://cdn.sqhk.co/pawekenu/g7DTghG/classlink_forsyth_daves_creek.pdfIn PDF document text
    • https://cdn.sqhk.co/fafaviwi/cpEgehh/roy_world_mod_apk_all_unlocked.pdfIn PDF document text
    • http://jigunemav.22web.org/46139156611.pdfIn PDF document text
    • https://gabubogoko.weebly.com/uploads/1/3/3/9/133997439/domasafom.pdfIn PDF document text
    • http://gewebud.22web.org/steam_distillation_experiment_lab_report.pdfIn PDF document text
    • http://zumedemuruva.22web.org/venimamesoveludesim.pdfIn PDF document text
    • http://ruloposozaxekon.iblogger.org/livetero.pdfIn PDF document text
    • https://cdn.sqhk.co/wujamufaw/eigleCs/18452542946.pdfIn PDF document text
    • https://cdn.sqhk.co/zeliravepuj/igggORc/text_stickers_for_facebook.pdfIn PDF document text
    • http://semazolowogafoj.22web.org/91886942402.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://potosalusuk.rf.gd/android_asset_studio_icon_maker.pdfIn PDF document text
    • http://lusuzajemofim.rf.gd/11978962436.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_off0000c08e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC08E 3216 bytes
SHA-256: 3e696ca54a3726f874c046f4235cb3edaed1455fbb53865d902b42d92293e53d
font_01_sfnt_off0000cc0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC0C 5192 bytes
SHA-256: 023bd7b833ad1fb0ed781f1accb504633eaaad1dcd96bf53b5869c51b85ce8a2
font_02_sfnt_off0000ddae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAE 14192 bytes
SHA-256: b2617e378b5f617ea154e8f075e37af78a1b115d583b33635e2e0947a44b512b

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