Malicious PDF — malware analysis report

Static analysis result for SHA-256 da16393aa43547bb…

MALICIOUS

PDF

77.5 KB Created: 2021-02-20 13:45:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffaeb18bf0ed800e9f08651fea275590 SHA-1: 7b073179639469da037358ed2d8aaffceed4715d SHA-256: da16393aa43547bb2a28837488c25d63ece3011279dac263f59d6e81edb97e87
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a phishing or trojan-like behavior. It contains a large number of external links, suggesting a link farm designed to redirect users to potentially harmful websites. The document body, though heavily obfuscated, appears to be a lure related to 'Apollo 13 movie questions worksheets', aiming to trick users into clicking on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/wix?keyword=apollo+13+movie+questions+worksheets
    • http://tadinos.22web.org/best_self_self_journal.pdf
    • https://retarabad.weebly.com/uploads/1/3/3/9/133997928/a581cd5c67564e.pdf
    • http://narosisebono.22web.org/jikosedak.pdf
    • https://wumibatolazonik.weebly.com/uploads/1/3/1/4/131437616/9189504.pdf
    • https://semitedajun.weebly.com/uploads/1/3/1/6/131636975/vixokazoz-pesebimoz-rodaduvazemorav.pdf
    • http://bamejudodenor.iblogger.org/wamivezagapogaxegidewoxi.pdf
    • https://megefutuw.weebly.com/uploads/1/3/0/9/130969536/674620.pdf
    • http://jegewuzewan.iblogger.org/hysteroscopy_guidelines_acog.pdf
    • https://gabukoxikala.weebly.com/uploads/1/3/3/9/133997771/refub.pdf
    • http://suzenax.22web.org/mebosupafosupiwow.pdf
    • https://fopojikanerev.weebly.com/uploads/1/3/4/8/134888820/3285886.pdf
    • http://sutugolewajoz.22web.org/67430543588.pdf
    • https://lumirofelefepo.weebly.com/uploads/1/3/4/8/134892557/8641161.pdf
    • https://cdn-cms.f-static.net/uploads/4450883/normal_601f9f288f1d5.pdf
    • http://nowemuzasam.22web.org/clostridium_difficile_guidelines_acg.pdf
    • https://static.s123-cdn-static.com/uploads/4491945/normal_5ffc4aaa5f704.pdf
    • http://sokuzise.iblogger.org/bodacious_bbq_bossier_menu.pdf
    • https://cdn-cms.f-static.net/uploads/4475739/normal_601f0d53f2fbe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://josetevuj.epizy.com/zumetatazudojoj.pdf
    • http://sogonuvusawi.epizy.com/lexijopofepunaxuw.pdf
    • http://melumudinev.epizy.com/ziluvizowokegemajotu.pdf
    • http://puvodiga.rf.gd/ruderebotinojexo.pdf
    • http://beverotunege.epizy.com/birthday_ahe_bhavacha_marathi_dj_song.pdf
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e40e.bin
c6c1ce38899f2dfc93507650e193d55b000702c58fea3607a887492bf07c23e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE40E 5276 bytes
font_01_sfnt_off0000f5f6.bin
556d2d0821c8c57f2360dd958d94268ff6bde800f26cbef1c018bb338ba95124		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F6 10504 bytes
font_02_sfnt_off00011a02.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A02 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.