Malicious PDF — malware analysis report

Static analysis result for SHA-256 f085babba9718839…

MALICIOUS

PDF

85.1 KB Created: 2021-03-05 09:14:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: f7be5c99075545a6257d6e9697c371c3 SHA-1: 24ee1d1cbfb95ad7ad47df09283054113bdff5fe SHA-256: f085babba971883930b759ac1480e6d4067cab55966e9dd33d6b297c3aecfc4f
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers as malicious. The document body, though heavily obfuscated, suggests a lure related to a game guide, likely intended to trick users into visiting malicious sites. The presence of external URIs and link farm heuristics indicates an attempt to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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/wix?keyword=magic+the+gathering+puzzle+quest+leveling+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4480423/normal_60160ee7be153.pdfIn PDF document text
    • https://gaxasexafarud.weebly.com/uploads/1/3/4/5/134590452/a8fb55a.pdfIn PDF document text
    • https://sefariduzaki.weebly.com/uploads/1/3/4/6/134665623/5c69f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384650/normal_60205150b23c1.pdfIn PDF document text
    • http://kalowodopole.mygamesonline.org/ernest_hemingway_house_tour_oak_park.pdfIn PDF document text
    • https://norenepativen.weebly.com/uploads/1/3/4/3/134315866/punig.pdfIn PDF document text
    • http://zutixononazetu.iblogger.org/email_formal_en_ingles_b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426697/normal_6016437a994bd.pdfIn PDF document text
    • http://reform-st.ru/frenchay_dysarthria_assessment_sample_reportuvmk5.pdfIn PDF document text
    • https://nudadisaxoge.weebly.com/uploads/1/3/4/0/134018155/ruwun.pdfIn PDF document text
    • https://fekagisikazepi.weebly.com/uploads/1/3/4/6/134680816/dudusivegedodej.pdfIn PDF document text
    • http://trikotoria.ru/54824517257cn6jy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://letutemoxeluz.onlinewebshop.net/rewriting_logarithms_practice.pdfIn PDF document text
    • http://niruduzef.epizy.com/mesesewujilavo.pdfIn PDF document text
    • https://0ecef3a8-5193-4df1-8dcb-1b7dd0f2be2a.filesusr.com/ugd/e6092c_a0334117014d444693dce2133714268e.pdf?index=trueIn PDF document text
    • https://356bbf58-84af-4bff-99a9-d03346e46411.filesusr.com/ugd/b5472a_92a746e6d4894c738bda61c9069fe5f6.pdf?index=trueIn PDF document text
    • http://vuropomap.epizy.com/transactions_essential_english_language_skills_guide.pdfIn PDF document text
    • https://47ab6ce1-aee6-4086-a8e7-31fe393d2411.filesusr.com/ugd/afbef4_32fb96bb7aa840c09d1a40ef5b881e59.pdf?index=trueIn PDF document text
    • http://beturatigamoli.epizy.com/spelling_bee_school_pronouncer_guide_2019.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_off00010e3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E3A 5576 bytes
SHA-256: 39e2bc4db1c86987dff6b374b9cccd7868fa033f2c4943426886f6569535255b
font_01_sfnt_off00012140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12140 11060 bytes
SHA-256: 7d85ba163567b804bac429b0947a47df527b40341b6fd490ce88b64ec2b0597d

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