Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cc30a174f244b2c…

MALICIOUS

PDF

74.8 KB Created: 2021-03-14 11:52:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ab0d2c3a675bac73ddddec1969af59dc SHA-1: 21d715e081b9eb10e21ef244eea8de5d35b1756c SHA-256: 6cc30a174f244b2c631daf50f01dffe55fece500b79a516c51bf57b3081ebb20
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one critical heuristic firing indicating a link to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a common attack pattern for delivering malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=how+you+win+a+game+of+golf In PDF document text
    • http://sipipewawezizuf.getenjoyment.net/wakuv.pdfIn PDF document text
    • https://cdn.sqhk.co/jotenitix/sgfOgje/judepix.pdfIn PDF document text
    • https://sajulivos.weebly.com/uploads/1/3/1/1/131164476/sofujidofomuvubum.pdfIn PDF document text
    • http://fumatiw.mypressonline.com/90939344777.pdfIn PDF document text
    • http://mujoxoluvisukid.getenjoyment.net/83122923379.pdfIn PDF document text
    • https://cdn.sqhk.co/xasakeza/j6hiWgh/cricket_australia_live_app_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/xexodaxafu/aijKOie/what_animal_are_you_psychology_test.pdfIn PDF document text
    • http://fakexexu.sportsontheweb.net/petodigu.pdfIn PDF document text
    • https://sojetupeduxagi.weebly.com/uploads/1/3/1/8/131856567/tebuvomovetuze_losanulubaveg.pdfIn PDF document text
    • https://jikuvubavul.weebly.com/uploads/1/3/5/9/135964228/cd560.pdfIn PDF document text
    • http://rajajime.mypressonline.com/mukov.pdfIn PDF document text
    • http://katorewudejizut.22web.org/punopaviwuramijetileb.pdfIn PDF document text
    • https://cdn.sqhk.co/wodabumamuv/hg10gdw/53866626023.pdfIn PDF document text
    • http://mareson.getenjoyment.net/27628354285.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gapoxuvopa.onlinewebshop.net/64642639633.pdfIn PDF document text
    • http://gesesasogibigaw.rf.gd/81331789793.pdfIn PDF document text
    • http://likalesiwala.epizy.com/chipmunks_tamil_songs_free.pdfIn PDF document text
    • http://zaxokejik.rf.gd/wuxatu.pdfIn PDF document text
    • http://sisawujeza.rf.gd/nutritional_information_zaxby_s_grilled_chicken_salad.pdfIn PDF document text
    • http://kefekebew.rf.gd/pojixafudedunadogeb.pdfIn PDF document text
    • http://tofalit.myartsonline.com/wafopiwagibelurevisiko.pdfIn PDF document text
    • http://kisezemewarajox.rf.gd/me_earl_and_the_dying_girl_movie_online_free.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_off0000e909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE909 4968 bytes
SHA-256: 1df0489911dd786a53e7ef1e24d9fa200d2083e472b7ee901a82be3816ad1e81
font_01_sfnt_off0000fa05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA05 10536 bytes
SHA-256: dd25ff95d4c12377098b94ff0d211e85caecdf14f5ddbc8cbc30a625e7054d48

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