Malicious PDF — malware analysis report

Static analysis result for SHA-256 071c970c1debcc61…

MALICIOUS

PDF

78.9 KB Created: 2021-02-18 22:42:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 541f6519bf4ea3e1e7e5c2a2ad8725f8 SHA-1: 44f160016d013518b9730a47c2a90e8a27e48601 SHA-256: 071c970c1debcc61c6fac67c834485a0dbcbdbd64e4630ba6165e9c1d33920a9
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs pointing to disposable domains and link farms, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to a camera manual, aiming to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wix?keyword=camara+canon+eos+rebel+t5+manual+espa%25C3%25B1ol PDF link annotation
    • https://jobadenel.weebly.com/uploads/1/3/1/1/131164033/34de20bdad1.pdfIn PDF document text
    • http://hihikane.space/38646567770yhkd0.pdfIn PDF document text
    • http://sdfsdfsdf.shaketorch.com/lajile.pdfIn PDF document text
    • https://gimuloge.weebly.com/uploads/1/3/0/7/130775506/7503175.pdfIn PDF document text
    • https://folatidaxewurel.weebly.com/uploads/1/3/4/3/134317863/keratijimagu_xekisagaw_kemidu_zitiberabuzuxa.pdfIn PDF document text
    • https://sexitikimuzulab.weebly.com/uploads/1/3/5/2/135296232/baperilaf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465277/normal_5fc9fb1d20084.pdfIn PDF document text
    • http://fortuneocredit.com/84267386361etkl6.pdfIn PDF document text
    • http://boputev.66ghz.com/84895436211.pdfIn PDF document text
    • https://xufizuwerab.weebly.com/uploads/1/3/0/7/130738786/509085.pdfIn PDF document text
    • http://dektesheff.xyz/autism_spiritual_problemwbi1j.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jotinonikudodi.rf.gd/47250430159.pdfIn PDF document text
    • http://memokikadu.rf.gd/zojeleroniviwoju.pdfIn PDF document text
    • http://rifunasi.epizy.com/blood_diamond_movie_free.pdfIn PDF document text
    • http://xofawuriduk.epizy.com/34123752542.pdfIn PDF document text
    • http://lazavosapazogil.epizy.com/barbie_doll_wallpaper_3d.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_off0000e79d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79D 5460 bytes
SHA-256: 3bc39f0d2e5973b27fdd040a25854e6c978dbd1ef713125ddbe6073e28626221
font_01_sfnt_off0000f9cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CF 16228 bytes
SHA-256: ea10adb7d8d94cda1d2f07e962ab67f8f86be6a5c083d64e906f42a80cf4aacb

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