Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbc7ded770bba81a…

MALICIOUS

PDF

71.0 KB Created: 2021-05-14 13:13:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ba624b1587325725da39dd5e22743f6e SHA-1: 2a10279aaa7d2e08dd05e99a96b3a82195af5684 SHA-256: dbc7ded770bba81ae42b0dc9cdb6f7f813a3579855806354970eafec8dfed36b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by a machine learning classifier and ClamAV. It contains numerous embedded URLs, with one prominent URL pointing to 'https://zajinet.ru/strik?utm_term=pentair+intelliflo+variable+speed+pump+parts', suggesting a phishing or scam attempt. The document body is heavily obfuscated, preventing a clear understanding of its specific content beyond the lure. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/strik?utm_term=pentair+intelliflo+variable+speed+pump+parts PDF link annotation
    • https://kuxadolawemigos.weebly.com/uploads/1/3/4/7/134712866/3160392.pdfIn PDF document text
    • https://cdn.sqhk.co/nexetifosam/lY9GhfF/29626991406.pdfIn PDF document text
    • http://waparudadip.mywebcommunity.org/zirel.pdfIn PDF document text
    • http://kogejirupu.getenjoyment.net/buwalef.pdfIn PDF document text
    • http://jixewelo.scienceontheweb.net/69991719868.pdfIn PDF document text
    • https://cdn.sqhk.co/tosobulig/aiizj7w/home_sweet_home_2_game_story_explained.pdfIn PDF document text
    • https://jekosupoma.weebly.com/uploads/1/3/1/6/131637113/4f97ce881db.pdfIn PDF document text
    • https://cdn.sqhk.co/vatomepipiw/rgddhax/vrse_batman_gameplay.pdfIn PDF document text
    • http://xanejog.medianewsonline.com/alligation_and_mixture_short_tricks.pdfIn PDF document text
    • http://xotujezal.mypressonline.com/alternative_education.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_245a42f2e2a14425b7ee62f33506d9bf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/51d84ed4-416e-433c-a7b6-464d21b4299e/439152211.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ab84126-7524-496f-b860-041136b8c899/metro_2034_gameplay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bf6101e-0ec0-44a9-b053-f435d76cd1a3/pafigarejegojefuxeparajaf.pdfIn PDF document text
    • http://sajulugebimisu.myartsonline.com/wing_chun_close_to_me.pdfIn PDF document text
    • https://5e6d3f51-9b35-4a29-baf4-1f036254a461.filesusr.com/ugd/99a8f2_175aea97c26a47a492ceec706ae332be.pdf?index=trueIn PDF document text
    • https://fa5d8e44-005d-4c05-925d-ba60cb7f5023.filesusr.com/ugd/121e37_295ce33866a74a279ed57d75f1982482.pdf?index=trueIn PDF document text
    • http://pekomuvave.myartsonline.com/mathematics_for_economics_and_business_ian_jacques.pdfIn PDF document text
    • https://6ddb26ad-aa8e-4a3e-a925-5cef6fc035e1.filesusr.com/ugd/d3d820_b929547f56a6421e86fbae74a7b7e0f2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/92b2718b-8f13-4299-b634-dbe249a128c9/journey_to_the_center_of_the_earth_2_full_movie_in_hindi_download_480p.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_off0000d811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD811 5388 bytes
SHA-256: 3319614ccc9487b2d3fc289bb3554d2485ee46912468708f7154b29c092380af
font_01_sfnt_off0000ea56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA56 10576 bytes
SHA-256: 2b4c508fcc6c877b79f1ee5afaff99ee6023598439b13d0e8861297b2aedbc86

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