Malicious PDF — malware analysis report

Static analysis result for SHA-256 010b34613442f6af…

MALICIOUS

PDF

76.7 KB Created: 2020-12-28 20:02:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6218238602cd5c5ca168d2f376da3d89 SHA-1: db885971498c7ddf125da1e134a2165152ecfa43 SHA-256: 010b34613442f6afcf5a2bedbccef0fd54d97000bb27a5d0dab936fbae52ecc5
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, appears to reference a recipe, suggesting a lure to entice users to click the malicious link. The ML classifier and ClamAV detection further support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/strik?utm_term=pound+cake+recipe+using+cake+flour+and+buttermilk
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/wejadafi-lanefemo-fejumilaxopevon.pdf
    • https://vasinurevesodux.weebly.com/uploads/1/3/4/6/134605286/vepanup_vakev.pdf
    • https://cdn-cms.f-static.net/uploads/4383918/normal_5fc1ba9fa3bf7.pdf
    • https://static.s123-cdn-static.com/uploads/4369907/normal_5fc659d61778b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/f7899867-5df7-48fb-8aa7-92161c913c57/7_strategies_for_wealth_and_happiness_free.pdf
    • https://s3.amazonaws.com/mubefula/pinoy_henyo_words_for_christmas.pdf
    • https://uploads.strikinglycdn.com/files/094f47a9-803e-4c97-bfc4-80284a695bfc/menatanozonivimovanaliru.pdf
    • https://uploads.strikinglycdn.com/files/e770b7a2-09d8-402d-b9c1-de6a8daed861/8236759347.pdf
    • https://uploads.strikinglycdn.com/files/53061c8c-80b2-4086-8f36-1732b25a8df2/58910168649.pdf
    • https://s3.amazonaws.com/fasanag/46533966743.pdf
    • https://uploads.strikinglycdn.com/files/4a9a096b-40e8-440a-922d-b5a1f227506e/33602114785.pdf
    • https://uploads.strikinglycdn.com/files/4031da3f-d5d4-4c67-9cda-91e4d943af05/70865314317.pdf
    • https://s3.amazonaws.com/tokudapele/fodazave.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df98.bin
4d0e4f51ecc52c59cd37d88cf9336bb58c19f87371dc9d4f367528d14b5a89c1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF98 5560 bytes
font_01_sfnt_off0000f260.bin
f214f5ab660dbac10d5ba47a3203978c36ac3ee95474b05207834469e8ac99bc
pdf-font-stream PDF embedded font (sfnt) at offset 0xF260 10812 bytes
font_02_sfnt_off00011757.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x11757 4324 bytes