Malicious PDF — malware analysis report

Static analysis result for SHA-256 0980747dd4464174…

MALICIOUS

PDF

93.9 KB Created: 2021-02-28 20:51:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a16f3d0c0ca49adbf93c249ffd5b6d3d SHA-1: 5c9e8374c6e75dfe832487b7f9335ecc3cc19dcf SHA-256: 0980747dd4464174f813371a9e690aa84e9e40c7b1fbdb4484191d0f2857168f
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely a phishing or trojan delivery mechanism. Although no scripts were explicitly extracted, the presence of embedded URLs and the heuristic firings point towards an attack pattern involving redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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=regents+biology+pauliki PDF link annotation
    • http://matawobedopikam.mywebcommunity.org/trolls_dance_song_cant_stop_the_feeling.pdfIn PDF document text
    • http://gagivukamuw.getenjoyment.net/ryobi_1800w_210mm_sliding_mitre_saw_review.pdfIn PDF document text
    • http://vodabutopidaru.getenjoyment.net/90923197057.pdfIn PDF document text
    • https://cdn.sqhk.co/xutazazo/ijhjdhh/my_replika_won_t_level_up.pdfIn PDF document text
    • http://soxiwokix.iblogger.org/42222942028.pdfIn PDF document text
    • http://francobusiness.com/lafetx96hw.pdfIn PDF document text
    • http://sendgrid-de.com/fracture_phalange_doigt_p3s5sj6.pdfIn PDF document text
    • http://organicnu.info/sigagowelupow8ef1d.pdfIn PDF document text
    • http://mumolazesinidix.getenjoyment.net/do_not_pray_for_easy_lives.pdfIn PDF document text
    • https://cdn.sqhk.co/dubibuwa/5L1jdif/heroine_mascara_remover.pdfIn PDF document text
    • http://wisemad.22web.org/ribonigase.pdfIn PDF document text
    • http://luwogexejel.getenjoyment.net/rovolukid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sijisizaf.rf.gd/sorokosavevomewipen.pdfIn PDF document text
    • http://fozelaw.epizy.com/glencoe_algebra_1_chapter_1_answer_key.pdfIn PDF document text
    • http://xolavozezimodan.onlinewebshop.net/watchman_nee_books_collection.pdfIn PDF document text
    • http://mevumum.epizy.com/35978396709.pdfIn PDF document text
    • http://tomikuwabawevup.epizy.com/the_princess_and_the_pea.pdfIn PDF document text
    • http://bodegifu.atwebpages.com/pijetawanaxuxa.pdfIn PDF document text
    • http://wagivudixar.epizy.com/6986817796.pdfIn PDF document text
    • http://nejimafalun.onlinewebshop.net/wanal.pdfIn PDF document text
    • http://favirivesez.epizy.com/54226689305.pdfIn PDF document text
    • http://xinofiri.epizy.com/14307536168.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_off00013245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13245 5204 bytes
SHA-256: 917b4e35bc20c0c0fe7ae6bd2176fddde62c1b99113d2597e8a358122a69ed66
font_01_sfnt_off0001441f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1441F 11424 bytes
SHA-256: 460fe56035ec7e9d8b275c151a9a280e07da8be2498b2bf4bd59144ebd59990f

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