Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0165f166e4930a6…

MALICIOUS

PDF

91.6 KB Created: 2021-02-22 08:58:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 4ae5bbb7ad774472804c670f9dd36bc7 SHA-1: b13c4cac53801df5dca098d0fda8faa60240b93d SHA-256: d0165f166e4930a6cfc80a4d04858ac588584038956b2c0e5e62a70b232f4aa8
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection infrastructure. The embedded content, though obfuscated, appears to be related to search queries, further supporting the phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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/strik?utm_term=what+is+the+star+format+for+interviewing PDF link annotation
    • https://zetodimamewiwek.weebly.com/uploads/1/3/2/3/132302859/aaebff66e3.pdfIn PDF document text
    • https://pulatufulufu.weebly.com/uploads/1/3/4/6/134610330/6132464.pdfIn PDF document text
    • https://cdn.sqhk.co/marivefigus/ibihjfP/2_pics_1_word_guessing_game.pdfIn PDF document text
    • https://cdn.sqhk.co/jarixizotib/fjjgcij/josututofe.pdfIn PDF document text
    • https://jujuguzifise.weebly.com/uploads/1/3/5/2/135299578/6f993ed11.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387218/normal_5ff71868362ae.pdfIn PDF document text
    • https://cdn.sqhk.co/vodadavubex/rxVjg6N/nick_jonas_height_2020.pdfIn PDF document text
    • https://bixowupe.weebly.com/uploads/1/3/1/4/131409305/vafivoru-wogefugegeruto.pdfIn PDF document text
    • https://cdn.sqhk.co/vumuwuxa/RIP1jgi/pedagekejopogogedibapok.pdfIn PDF document text
    • https://cdn.sqhk.co/leporolino/182jiKF/coffin_dance_meme_roblox_id_code.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367296/normal_6011ee2da813a.pdfIn PDF document text
    • https://vomudata.weebly.com/uploads/1/3/2/7/132740307/6d3dd7efa3c9d4c.pdfIn PDF document text
    • https://cdn.sqhk.co/wufevinek/jd9hfih/neighborhood_jam_tulsa.pdfIn PDF document text
    • https://rorujazikuje.weebly.com/uploads/1/3/1/3/131379225/bedewogu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383340/normal_5fc922e148d14.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464735/normal_5feb69dfc5691.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0A 5312 bytes
SHA-256: 83276a98196b3c73792011e2fbd35b80e5ff7e9a8d582ff4791430c2f36dbc0a
font_01_sfnt_off00011c08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C08 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off00012496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12496 11028 bytes
SHA-256: 02d92405e68d1fc8f26e4cb976c9922e5c766704fb6a118930bc02f5c0ea48ba
font_03_sfnt_off00014a6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A6A 16312 bytes
SHA-256: 531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660

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