Malicious PDF — malware analysis report

Static analysis result for SHA-256 307678e8e680143f…

MALICIOUS

PDF

80.5 KB Created: 2021-05-18 21:40:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41b71aeb37b4b6d859956792ae063f57 SHA-1: 2b5a0ae2b57fece1390a1a4a8c2308af13a14cf4 SHA-256: 307678e8e680143f850ff9d2c4548baf8524b8138fef9c899d63b920b7c206ad
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious URL, and ClamAV detection indicates it is a phishing trojan. The ML classifier also flagged it with high confidence. While the document body is heavily obfuscated, the presence of the external URI suggests an attempt to redirect the user to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://ponafet.ru/strik?utm_term=ikea+tylosand+assembly+instructions
    • https://cdn-cms.f-static.net/uploads/4416935/normal_6054867ff0e01.pdf
    • https://cdn-cms.f-static.net/uploads/4444866/normal_603f4870734d6.pdf
    • http://monufovaxuj.66ghz.com/soxepusepikesawazeki.pdf
    • https://cdn-cms.f-static.net/uploads/4427783/normal_6058ae99efe9b.pdf
    • https://xizavuxovom.weebly.com/uploads/1/3/3/9/133986710/8569593.pdf
    • https://cdn-cms.f-static.net/uploads/4448096/normal_6045bfc69731a.pdf
    • http://tadezutalowebe.22web.org/formatting_java_code_in_intellij.pdf
    • https://static.s123-cdn-static.com/uploads/4416143/normal_5fcbf47d778d9.pdf
    • https://debugifepini.weebly.com/uploads/1/3/1/0/131070476/ripubo.pdf
    • https://jaxedafotonomut.weebly.com/uploads/1/3/4/8/134885779/9000157.pdf
    • https://donokodupotev.weebly.com/uploads/1/3/4/3/134317189/6535781.pdf
    • https://wikafifej.weebly.com/uploads/1/3/2/8/132815388/pegesaduzepa-fomav-vuwega-movixivifogoxe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/efad0516-94b7-40e3-bf17-579aac2f8d83/xapakibagemepinino.pdf
    • https://uploads.strikinglycdn.com/files/d2c065fe-b4fb-419c-ae4b-52d051d12592/which_version_of_pride_and_prejudice_is_closest_to_the_book.pdf
    • https://uploads.strikinglycdn.com/files/b00191b5-b704-474f-a7e3-c33e3db2254e/kejowevedubaxiwesenomosun.pdf
    • https://uploads.strikinglycdn.com/files/9a89e354-4ae6-4215-bbe3-e847b05ae93b/dulonibenugitativaniju.pdf
    • http://nesemuvalumut.rf.gd/2020_attractions_ontario_reciprocal_program.pdf
    • http://dimebuturerab.epizy.com/30555420947.pdf
    • https://uploads.strikinglycdn.com/files/ddd688b7-2bd0-44a6-80d9-814a5d3cdefb/thinkpad_t420_dimensions.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f706.bin
377e9e215aa37e22f71280808d04ffa085e4028a1fc6d33d3714bb9796b053de
pdf-font-stream PDF embedded font (sfnt) at offset 0xF706 5328 bytes
font_01_sfnt_off00010916.bin
4412c394f626243b564204f216a9a043d8fe4cd9722bde59a7ee9c9dd42f3115
pdf-font-stream PDF embedded font (sfnt) at offset 0x10916 12844 bytes