Malicious PDF — malware analysis report

Static analysis result for SHA-256 39cddb988c46f46f…

MALICIOUS

PDF

72.2 KB Created: 2020-11-19 06:34:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 47ee2750ce3fe1052a106653cce330b4 SHA-1: 7cf5f8dd4d5a36e8f449ece587249667b04c54c3 SHA-256: 39cddb988c46f46fe7ef6a943a004d9362609deb38627755c0060635dec4bbd5
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains multiple links to redirector domains, including one specifically identified as a malicious redirector. The presence of numerous PDF links suggests an attempt to distribute further malicious content or engage in phishing activities. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://cctraff.ru/aws?utm_term=appcake+no+jailbreak In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377095/normal_5f9d867d1c654.pdfIn PDF document text
    • https://nalatuzub.weebly.com/uploads/1/3/4/3/134324595/1061242.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/40ddfa4d7f4e3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369524/normal_5f990fb8c41e4.pdfIn PDF document text
    • https://damuxuru.weebly.com/uploads/1/3/4/0/134040763/basefofamuzirisodol.pdfIn PDF document text
    • https://tibesegekor.weebly.com/uploads/1/3/4/4/134495245/05558f1c3c5af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369329/normal_5f8d5b98dfbb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413843/normal_5f9f60ae9d207.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453102/normal_5f9f3e7e1c614.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377407/normal_5fa0b89229eb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459477/normal_5fa97f993d9bd.pdfIn PDF document text
    • https://tojaluteder.weebly.com/uploads/1/3/4/3/134384479/6104859.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sitozi/67271448290.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/staples_bedford_nh.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0CD 4724 bytes
SHA-256: 7fb3e78d2266641c27dab68714973161cb801d48739904dfd826c958bea2d630
font_01_sfnt_off0000e0cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CD 10848 bytes
SHA-256: 1c73baeb8eb9d00e07743f73b92bb865d5f4ea427866c6741ba01570164d61c9
font_02_sfnt_off00010601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10601 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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