Malicious PDF — malware analysis report

Static analysis result for SHA-256 7299c18a0bafefcc…

MALICIOUS

PDF

79.3 KB Created: 2021-02-19 18:39:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 8576e75d406e3cf2fb38fdd178c9f364 SHA-1: 542b65686c7bf8aae956cb298a7ef8efd1e5588d SHA-256: 7299c18a0bafefcc8312967753e37e9fccbdefe7d1fa90b7ae1c24ca82d87112
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically mentioning 'repairman for ge washer' and leading to a suspicious domain. Heuristics indicate the PDF is a link farm on disposable hosting, and ML classifiers and ClamAV strongly flag it as malicious, likely a phishing or trojan delivery mechanism. No scripts were extracted, but the presence of numerous external links suggests the document's primary purpose is to redirect the user to malicious sites.

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://seumenha.ru/123?utm_term=repairman+for+ge+washer PDF link annotation
    • http://dom-bita.org/fb_messenger_loginbr7cw.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/eTiipgd/66772646209.pdfIn PDF document text
    • http://italdom.fun/kagirubuwuvuwivozidobe7layl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388173/normal_5fc677bb89713.pdfIn PDF document text
    • http://cardio-active.site/moneygram_locations_in_appleton_wi1wf5g.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413000/normal_5fecfc8aca07a.pdfIn PDF document text
    • https://cdn.sqhk.co/seponidozit/jbUhcih/35933798737.pdfIn PDF document text
    • https://komamizidunip.weebly.com/uploads/1/3/1/4/131437982/tipatobi_nekuni_suterezapiruze.pdfIn PDF document text
    • https://gimituwemowi.weebly.com/uploads/1/3/4/8/134872285/8767530.pdfIn PDF document text
    • http://tameenegypt.com/sanuzoloxomewetobelifemazqo276.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485308/normal_6023c5255b244.pdfIn PDF document text
    • https://cdn.sqhk.co/webepinovet/bianjj6/getoxifojalijim.pdfIn PDF document text
    • https://cdn.sqhk.co/komagiju/qMiap6f/abc_radio_movie_reviews.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gugamofizuxeg.epizy.com/brioche_roll_nutrition_information.pdfIn PDF document text
    • http://xovigukesejibem.rf.gd/how_to_insert_image_into_photoshop_template.pdfIn PDF document text
    • http://winavetipi.epizy.com/creature_3d_film_song.pdfIn PDF document text
    • http://bemunaxeje.epizy.com/como_acoplar.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_off0000f855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF855 5380 bytes
SHA-256: 7baa326a9a9cd1a411d954d2da068f4e946298df13397c9cbe308222e02e20e9
font_01_sfnt_off00010a97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A97 11092 bytes
SHA-256: a2a925363d2f7b633e8facdc98d7164a466b37370ee71ad49f2e65940264eb08

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