Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1c1380b8ca521b1…

MALICIOUS

PDF

78.3 KB Created: 2021-03-25 14:20:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1ac19d28d55f4460c7694d22b83558d SHA-1: 81607b0e5801ec04071c16ae767fee6a9e3c6cb1 SHA-256: e1c1380b8ca521b19fe6c2e46b09f4730e2969cb7812a4a3bd21ec923e0804d8
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's designed to redirect users to potentially harmful sites. The document body, though heavily obfuscated, appears to contain metadata related to product pricing, likely serving as a lure to disguise the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/strik?utm_term=samsung+sm-t350+price+philippines
    • https://velelamoju.weebly.com/uploads/1/3/1/4/131438442/2d82ee2.pdf
    • https://jikovezogid.weebly.com/uploads/1/3/1/4/131407088/8dec2f24b2cd68b.pdf
    • http://larebalin.mypressonline.com/12628570172.pdf
    • https://femodamokej.weebly.com/uploads/1/3/4/5/134529999/bf9f7f8b.pdf
    • https://dudafenerow.weebly.com/uploads/1/3/4/9/134900552/gadomef.pdf
    • http://tuzupibu.scienceontheweb.net/manet_mobile_ad_hoc_network.pdf
    • http://wixosefimaba.scienceontheweb.net/does_diastasis_recti_go_away_after_pregnancy.pdf
    • http://vovality.club/why_was_the_chasers_war_on_everything_cancelledvdo1l.pdf
    • http://pofuxubilet.sportsontheweb.net/how_to_play_walk_dont_run_on_the_guitar.pdf
    • http://fuzabura.sportsontheweb.net/50167221608.pdf
    • http://gagapazu.scienceontheweb.net/amoxicilina_clavulanato_bula.pdf
    • http://pewekelexu.mygamesonline.org/48971745180.pdf
    • http://libertinemodels.com/simmons_sd7pk_moduleu7wfq.pdf
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/peruzubal_mirowaviw.pdf
    • http://clubstore.pro/gijijigujqihmc.pdf
    • https://weduparazibad.weebly.com/uploads/1/3/4/7/134710999/2687589.pdf
    • http://felepuregivo.iblogger.org/78048575695.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://mivuzovi.epizy.com/green_smoothie_challenge_recipes.pdf
    • http://jevusavisa.epizy.com/mp_map_hd_image.pdf
    • http://mukulug.rf.gd/79669184663.pdf
    • http://duwujupis.epizy.com/78384612485.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0ce.bin
685b103e793c2ea9d61b7795aff258104fb456192c410b0e8accc226ecf4c1b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CE 5912 bytes
font_01_sfnt_off000104cd.bin
aa2142c449c9c2702feb8ec2571d86a4d3b6d510f1dd55e905d5db1d40f5d681		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104CD 11896 bytes

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