Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fad8e4230e23a75…

MALICIOUS

PDF

71.7 KB Created: 2020-11-11 17:34:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 36619dae3ab4882fcfcac1431b76b149 SHA-1: bb6f3b977cd74be299690175c24a31f5d6c2e0e2 SHA-256: 4fad8e4230e23a75c5df3ad5dcf76ae7684f2a817654c70056b88514c81d205d
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'https://traffmen.ru/aws?utm_term=understanding+the+scriptures+didache+series+answers'. This URL is likely used to lure the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL in a PDF is a strong indicator of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://traffmen.ru/aws?utm_term=understanding+the+scriptures+didache+series+answers In 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/baddc3a1-d524-4d87-8009-d05c9dd503ce/korulegekekoxebafe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15b96e9d-f55d-4ba9-9cd5-6e051b78a19b/wioa_section_116_b_2_a_ii.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/ziraradilu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb298d54-1e21-4d52-ba14-090aeb342f56/kolujojijeronevabu.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/new_spring_robert_jordan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ac857d6-521c-4ceb-8b34-8b98829c9097/37235045897.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/beturedubolikiza.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/kitoni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75b9c565-379a-4421-b59f-25edeadbab4d/the_true_gentleman_creed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea02208a-0f52-4839-8c2d-b70122931ccd/boniduviwivojatirege.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/tosaluvib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41993a67-7709-4e83-9cb6-15d0bb8b8e6a/73991481366.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/believe_in_yourself_book.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/hawke_cable_glands_catalogue.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_off0000dc2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2D 5384 bytes
SHA-256: f84d1b50b9c046cac7ce7642603fb95212b15aa5d72077cba73271fef9c37c30
font_01_sfnt_off0000ee8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8E 10328 bytes
SHA-256: 5a218e85ea3b034fe606f9d31cdc664570658a3d0eb425b52fd24937d913472f

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