Malicious PDF — malware analysis report

Static analysis result for SHA-256 8978b1b4f7b3e4c1…

MALICIOUS

PDF

85.1 KB Created: 2021-05-07 09:15:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: b0150a775141d15b788614e0d6cb9b58 SHA-1: ac0f10e750e6bc9d2c7b5d066af025e740126ee0 SHA-256: 8978b1b4f7b3e4c18cc64ca197fbf6390bb60c1a6efc40beb88399fee8a2b0a1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. The document contains numerous embedded URLs, many of which point to disposable hosting or redirectors, suggesting a phishing or malware distribution attempt. The presence of a URL with a 'utm_term' parameter related to a 'feeder display not working' indicates a social engineering lure to direct the user to a potentially malicious site.

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://golowaki.ru/strik?utm_term=wildgame+innovations+feeder+display+not+working PDF link annotation
    • https://cdn.sqhk.co/suwixowefa/jiyghXy/82058516233.pdfIn PDF document text
    • https://cdn.sqhk.co/womilepeba/hehjGii/35422384192.pdfIn PDF document text
    • http://gediputelilana.22web.org/xibaduxasakimabidevigo.pdfIn PDF document text
    • https://cdn.sqhk.co/ribuwikoli/jghasgW/math_graphing_calculator_free.pdfIn PDF document text
    • https://cdn.sqhk.co/balatexoriv/jXjjfgQ/51838638625.pdfIn PDF document text
    • http://gafabotipunofu.mywebcommunity.org/french_english_frequency_dictionary.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/3b273077-eabe-4aa2-a2eb-539f275ba37b/7200542229.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/laurel_wreath_crown_template.pdfIn PDF document text
    • https://f6e2a16f-d004-42cd-8f17-0463e090774c.filesusr.com/ugd/c70c35_57501d16563f4c09a1539810ef49c639.pdf?index=trueIn PDF document text
    • https://9ef77391-fdd1-48d8-ba15-364b07375333.filesusr.com/ugd/ebefdf_f30932d2dd964999be3a0cec0240155d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/moduluzuxikari/federal_employees_benevolent_fund_form.pdfIn PDF document text
    • https://6d706a39-1f93-4f1a-9423-caccf7e65e71.filesusr.com/ugd/69f91f_461f85d4bb5b4d4ba34048b081fabab0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b68039b2-7c54-488e-b275-46a05a9c3792/tubadedoke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34dbe9ee-2622-43ea-a4c0-a0f055735139/1333372453.pdfIn PDF document text
    • http://sebuzozogari.epizy.com/ganatasazowatopevamupazep.pdfIn PDF document text
    • https://6d428a25-da86-44fa-8f13-5b0f09742281.filesusr.com/ugd/3649d2_9167851032934529b1454833130120f3.pdf?index=trueIn PDF document text
    • http://pusebirenox.myartsonline.com/actitud_positiva_y_negativa.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/povuzosubo.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/xosebatimid.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_off000109f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F9 5692 bytes
SHA-256: d1d263873ed344a47f897a4de00d25f59ceb9dd426d58d32c7862ba6d6d4c656
font_01_sfnt_off00011d6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D6E 11716 bytes
SHA-256: 529af3b373683727fb0394f8aa45c6db71d2adf575625658a976cf97223c5882

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