Malicious PDF — malware analysis report

Static analysis result for SHA-256 c38b14ae6a6522ac…

MALICIOUS

PDF

69.5 KB Created: 2020-12-03 17:44:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04a75f164f8fa7468215401acd0f2526 SHA-1: 793f3dd970ee99a042c5349037c464d0442e8b8c SHA-256: c38b14ae6a6522ac9037ecafb1c539af972ec9c672857d713cafd82570509f94
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. The presence of the URL 'https://traffset.ru/aws?utm_term=filter+by+color+in+google+sheets' suggests a lure to a potentially malicious site. ClamAV detection and ML classification further indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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
  • 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://traffset.ru/aws?utm_term=filter+by+color+in+google+sheets
    • https://dapujevubo.weebly.com/uploads/1/3/1/4/131438680/61abba6.pdf
    • https://sexiguviwuzokal.weebly.com/uploads/1/3/4/6/134687255/72467caef6a14.pdf
    • https://cdn-cms.f-static.net/uploads/4454438/normal_5faae12988f25.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/84339477-ad26-4a5e-9081-c69bf9b3eed8/21123879377.pdf
    • https://uploads.strikinglycdn.com/files/a36f9a48-5f2c-48b9-a7a4-90f47243e25e/google_home_widget.pdf
    • https://uploads.strikinglycdn.com/files/320958ba-4b2d-44cc-8c26-7781ec7d1a73/10902928707.pdf
    • https://uploads.strikinglycdn.com/files/861aec08-3753-4c4c-9ef6-b633b8fd555c/adobe_acrobat_pro_9_serial_number.pdf
    • https://uploads.strikinglycdn.com/files/2705142f-cd94-46ed-887c-562ed5f617e3/bdo_black_spirit_crystal.pdf
    • https://uploads.strikinglycdn.com/files/fb52225b-6d02-4029-b27b-065f0f9299ba/kutofexiz.pdf
    • https://uploads.strikinglycdn.com/files/bf46c89d-4137-44ad-bbca-3ff48dcf46e0/dedaxifutuwolimekemigix.pdf
    • https://s3.amazonaws.com/zifozujiwi/snowy_christmas_tree_vector_free.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_off0000d331.bin
6ea811e8c2967726c1db37db3c426e4e88581670b1cfe8352a45ba44e4964489
pdf-font-stream PDF embedded font (sfnt) at offset 0xD331 5048 bytes
font_01_sfnt_off0000e464.bin
2346fc5008e6dda15d546a4e3fbd2d60acdf121f800e6d982e3a45094c3e1cc0
pdf-font-stream PDF embedded font (sfnt) at offset 0xE464 10664 bytes