Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ed5a1a4453f8b37…

MALICIOUS

PDF

76.7 KB Created: 2021-05-13 08:25:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 5d15c76b6ec7b71a95ac28a9b96074f8 SHA-1: 93d717701b8b0e6de9fc48e85de5ab584dd95754 SHA-256: 9ed5a1a4453f8b37c11d9ca4ee483e2601fa58984749fe89815a6c854d81789b
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, many pointing to disposable domains, suggesting a link farm or phishing infrastructure. The PDF structure and embedded URLs are indicative of a phishing campaign designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://druttle.ru/strik?utm_term=physical+activity+readiness+questionnaire+%2528par-q%2529 PDF link annotation
    • http://tryse.xyz/what_is_a_single_strand_of_dna_calledmep6h.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389387/normal_6051f5b3482f4.pdfIn PDF document text
    • http://hisgohar.site/siweruvovpn2c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405179/normal_5ffff691323cc.pdfIn PDF document text
    • http://pojawokoxenin.iblogger.org/craftsman_edger_carburetor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501789/normal_5feb9753ae50c.pdfIn PDF document text
    • http://dom-bita.org/newizaduriivvc.pdfIn PDF document text
    • http://hookup754.fun/learn_to_sing_in_tune_online_free0m0cu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388824/normal_6017d03449f46.pdfIn PDF document text
    • http://kufemotobenin.66ghz.com/64251327233.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472753/normal_5feb5219ec6a6.pdfIn PDF document text
    • http://tadezutalowebe.22web.org/xutatepidujarunubakiga.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c2145d6-0526-4014-975b-367fa33cf862/yoga_book_in_gujarati.pdfIn PDF document text
    • http://rakulewozagax.rf.gd/71655771784.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/2092560910.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40fd81a5-5b89-4567-a16a-3d25ab8dd678/97331284415.pdfIn PDF document text
    • https://s3.amazonaws.com/fifuto/48597078792.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/71227797016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8970aa68-7286-4131-8b61-351c155db2f6/naomi_in_the_living_room_plot.pdfIn PDF document text
    • http://jimabepur.rf.gd/witezodidudaw.pdfIn PDF document text
    • http://kofatudivamoge.epizy.com/giridogogizoset.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/ark_survival_evolved_food_recipes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/116e8d98-1f93-42a7-b32c-e91a98b43629/acorn_180_stairlift_battery_replacement_instructions.pdfIn PDF document text
    • http://lowakeze.rf.gd/69149354660.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_off0000ee0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0E 5636 bytes
SHA-256: 26de9d01dcdece61352f2519f865f53f5fef5be549866b7b35380e4e48ad5155
font_01_sfnt_off0001014e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1014E 10336 bytes
SHA-256: 7ad26ceff690a793843881e0df005fcdbe2892119dc80fb08bcf25330453c58d

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