Malicious PDF — malware analysis report

Static analysis result for SHA-256 03a68411dd52e9f9…

MALICIOUS

PDF

92.8 KB Created: 2021-03-29 00:48:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d36435c884b7e17fbb63f4f0a2663013 SHA-1: eac19f9047b568f391bba9236e47e90a91f04c7b SHA-256: 03a68411dd52e9f9126bafab976d7b5e45586242851dc32fb510107f786a9720
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which are hosted on disposable domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or ad fraud. No scripts were extracted, but the structure suggests it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://soxebez.ru/aws?utm_term=mfc-7840w+reset+drum+life
    • http://megatorg.ru/life_operating_meaningqt03v.pdf
    • https://tupusedaluniji.weebly.com/uploads/1/3/0/7/130738871/53bba8a48c.pdf
    • https://cdn.sqhk.co/kopilixa/jfgd2ib/wheel_of_fortune_game_answers_event.pdf
    • https://zewabezasakaru.weebly.com/uploads/1/3/4/5/134593707/aa6d8bbcc5aa.pdf
    • https://cdn.sqhk.co/wusirilunoko/qidEVgx/last_event_app.pdf
    • http://asia.kiwi/gologugosazeda8edw4.pdf
    • https://gewipilozu.weebly.com/uploads/1/3/0/7/130775211/1466233.pdf
    • https://govonomuvilikiw.weebly.com/uploads/1/3/4/6/134620083/8a765eb44.pdf
    • http://tpdreport.com/what_does_tiger_moth_caterpillar_eat3lpp4.pdf
    • https://cdn.sqhk.co/galudubujuwa/hrjcij5/best_deal_zone_now_reviews.pdf
    • http://bcpzonasegura10beta-viabcp.com/83083988169yxg9s.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://c809e8a6-5bdf-489d-8d8c-df4e4638a115.filesusr.com/ugd/45a296_830203501a5d4289aa4f8cb55d5b057a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/43f46f6b-9d54-4720-a28d-93a33a28f732/zumuvivemubopepunav.pdf
    • https://8b83d164-5e56-46cc-b941-48f48810ddf3.filesusr.com/ugd/76ce43_f8b08874eaea44f2a02aff8530a0d753.pdf?index=true
    • https://de7eff9d-5c50-4122-bb99-ee112abf7a8f.filesusr.com/ugd/db8f21_34c10eead94a498caff686b481ad9c98.pdf?index=true
    • https://387a498e-9551-4239-9507-3183ba214552.filesusr.com/ugd/cd403b_f34def290dfa48abb6035a0636e727bf.pdf?index=true
    • https://59cf682b-6680-4a08-8b8d-0472bab64ef7.filesusr.com/ugd/d7d6cd_89c92346eb3f4b8bbbb5c2b260a61de4.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a8f72e30-7ba1-4597-b79a-e766f527f989/22811499242.pdf
    • https://d3dd75b0-514a-4dbf-a1f7-973a5b421fb1.filesusr.com/ugd/5b46ec_9815285c3c4748e1bc2d0f0441d51c16.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010afb.bin
13ad6b040832ab02af4878b8f9149ab76e8863e789253b853c4ecc07eba8aabb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFB 5588 bytes
font_01_sfnt_off00011e20.bin
41af5d7fbab1f3b47b59c1cbebd6e957d97312ded478c81496bfaeb32bb9ebd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E20 22264 bytes
font_02_sfnt_off00015106.bin
099d6ecc4c90b811dbcb347f43da84e98a92fba700bdaed59cba77f47198b333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15106 16120 bytes

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