Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a8276435e0d89ee…

MALICIOUS

PDF

72.1 KB Created: 2021-03-21 02:53:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 593794b102524db70e08b6b4e224cf4d SHA-1: 28e7a4ea7e10cc25e1a41de72370b078aca23ae1 SHA-256: 6a8276435e0d89eeaeceaac6a6bfac8a86ac8b81498fc24f6926c1a811fe9e10
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and an ML classifier returned a high probability of maliciousness. It contains numerous embedded URLs pointing to external sites, some of which are hosted on disposable domains, indicating a link farm or phishing lure. The document body, though heavily obfuscated, suggests it is related to identifying rhetorical appeals, potentially as a deceptive pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/wix?keyword=identifying+rhetorical+appeals+worksheet+answers PDF link annotation
    • https://moforikegumiret.weebly.com/uploads/1/3/2/6/132680993/xabebanafexekasud.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388627/normal_5fdf1757b37ff.pdfIn PDF document text
    • http://roxelejabojafe.scienceontheweb.net/34023476150.pdfIn PDF document text
    • https://cdn.sqhk.co/nuditufu/iiXn8AR/17720631705.pdfIn PDF document text
    • http://nabavawuzafurur.mygamesonline.org/46727969972.pdfIn PDF document text
    • https://cdn.sqhk.co/libuzewis/2jiNgfe/forma_adventure_low_motorcycle_boots_review.pdfIn PDF document text
    • https://cdn.sqhk.co/teforoke/cifigPS/biggest_marketing_agencies_in_chicago.pdfIn PDF document text
    • http://zusiwibewire.mypressonline.com/the_adventures_of_huckleberry_finn_sparknotes_chapter_26.pdfIn PDF document text
    • http://jiwimejikigigu.mywebcommunity.org/vamufirepelalez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380209/normal_603c63bebe2c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420432/normal_600b51c75dcae.pdfIn PDF document text
    • http://vurovolapoza.mygamesonline.org/31060249830.pdfIn PDF document text
    • http://bisibometixo.mywebcommunity.org/96171521699.pdfIn PDF document text
    • https://jusodizepo.weebly.com/uploads/1/3/1/0/131070216/pifafatanes.pdfIn PDF document text
    • https://zozelezike.weebly.com/uploads/1/3/4/4/134434207/ganewimaxolef_tixir_fofizid_nopiwirowuxoses.pdfIn PDF document text
    • https://cdn.sqhk.co/jumifokujuje/jf8jeha/smugmug_login_problems.pdfIn PDF document text
    • http://tapozifokun.mywebcommunity.org/how_to_write_a_final_draft_of_a_research_paper.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bibezakomi.myartsonline.com/68266609838.pdfIn PDF document text
    • http://kilarosine.atwebpages.com/75779968536.pdfIn PDF document text
    • http://visugog.myartsonline.com/30171063124.pdfIn PDF document text
    • http://lojibovel.myartsonline.com/90840818267.pdfIn PDF document text
    • http://laxuzoto.onlinewebshop.net/54479463656.pdfIn PDF document text
    • http://xomutojekes.myartsonline.com/jufemipixa.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_off0000dc7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC7B 5612 bytes
SHA-256: 68e1d2235edf7abe18b7bfde38218268cec87ab407c4f81c3b4ffab66cb2a710
font_01_sfnt_off0000efab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAB 10228 bytes
SHA-256: 521db276c3f3216b4894311f5e6d29db6dae9173e35d041b9b51296d09320216

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