Malicious PDF — malware analysis report

Static analysis result for SHA-256 44c3599bf1941b0a…

MALICIOUS

PDF

90.5 KB Created: 2021-05-18 10:28:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e08547f7215aceee34ea13f4ad23e01f SHA-1: 217b409199cd9a02c4fce3d0e302c0ad0650a7d4 SHA-256: 44c3599bf1941b0a13a00361545e023cc4fa6d54c504f816b598f52ef9ddffb7
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that redirect to a malicious domain, disguised as a manual download. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://lozipotod.ru/strik?utm_term=coleman+powermate+6250+manual+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4375515/normal_5fd064f9728eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468286/normal_60199d3049d1f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457620/normal_5fe1125ac7c6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449766/normal_6016c5c50b761.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490123/normal_601621ec6049c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462708/normal_5ffa3bb3c7492.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406789/normal_605a2cb29e183.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384821/normal_5fd21cfeb72bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393632/normal_606cb1915ab73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406776/normal_601c5e60e48f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382208/normal_6028bba10e41f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470028/normal_605f65ce22c61.pdfIn PDF document text
    • http://tinutig.22web.org/87512142757.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492588/normal_603cacba87ee4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/augusto_cury_livro_voc__insubstituvel.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/vinamubatijat.pdfIn PDF document text
    • http://ratadipemor.epizy.com/company_profile_samples.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/amino_acids_list_and_structure.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/zarinesokulevotimix.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/12158748297.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/7629903339.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/tosujisibivejutifekutof.pdfIn PDF document text
    • http://pudubekij.epizy.com/15497421085.pdfIn PDF document text
    • http://numakuzugurewi.rf.gd/4286294924.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8C 9016 bytes
SHA-256: ba94081858bcb874dccce7541f73c7bf37ac4290adba03c9d71ba2befaeb5d76
font_01_sfnt_off00011da2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA2 5556 bytes
SHA-256: 52191f1ba83d91a86917c297c9c7f7a543706f1377ad973a565a4987822b5056
font_02_sfnt_off00013082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13082 13372 bytes
SHA-256: 78818e632d607efab70ad5272dbd8d50efc7c16fe1e408abe7f97346c00d5698

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