Malicious PDF — malware analysis report

Static analysis result for SHA-256 327fb01a3df8802d…

MALICIOUS

PDF

73.5 KB Created: 2020-11-24 04:22:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e81e312625a3c7a3af2f2f0f5dfa3b3 SHA-1: 5df9f956fd9c4192a24f63d3e2d674764d9d0dca SHA-256: 327fb01a3df8802dbce725d92d0d7ef706bf3b1c061b42a173ebe595a9b8a748
214 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics, including a malicious redirector link and a link farm, indicating a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the embedded URLs point to suspicious domains and a large number of other PDFs, suggesting a coordinated effort to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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/123?utm_term=define+closed+form
    • https://cdn-cms.f-static.net/uploads/4463010/normal_5fa23d7aa6242.pdf
    • https://cdn-cms.f-static.net/uploads/4471082/normal_5fa697d9c503b.pdf
    • https://bowonusafepa.weebly.com/uploads/1/3/4/3/134319531/347849.pdf
    • https://cdn-cms.f-static.net/uploads/4415537/normal_5fa2988d4a959.pdf
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/473218.pdf
    • https://cdn-cms.f-static.net/uploads/4365539/normal_5f88bd29949cf.pdf
    • https://cdn-cms.f-static.net/uploads/4367631/normal_5f875f0fb8201.pdf
    • https://solubowobadiwu.weebly.com/uploads/1/3/4/6/134642134/9496006.pdf
    • https://cdn-cms.f-static.net/uploads/4372967/normal_5f9108028401f.pdf
    • https://fobujetomifaj.weebly.com/uploads/1/3/4/7/134765034/lirirev.pdf
    • https://cdn-cms.f-static.net/uploads/4416659/normal_5f953b45c5922.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/buxoparadazegu/21369184714.pdf
    • https://s3.amazonaws.com/zuxadol/sight_and_sound_donation_request.pdf
    • https://s3.amazonaws.com/nijudow/handbook_of_color_psychology.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc28.bin
9f23540ec6fd1ec7a71ee3273c500a4a6096b82beaa960280bb66936cfe1deab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC28 4956 bytes
font_01_sfnt_off0000dcf9.bin
0ccd5678c70329a919fea829856ae468f2422860b5409e1919b2fde2c253ac9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF9 11380 bytes
font_02_sfnt_off00010449.bin
52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10449 16036 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.