Malicious PDF — malware analysis report

Static analysis result for SHA-256 63e73181e16140bf…

MALICIOUS

PDF

101.9 KB Created: 2020-11-27 10:31:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f53cacff8c45772c12b07506a50e601f SHA-1: 7762579aad7649047bbd87203d9851cea44223b5 SHA-256: 63e73181e16140bf6ffc5bc928f77d366db38d3afc3df2b699b495f4474526ec
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffine.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 5

  • 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.
  • 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://traffine.ru/strik?utm_term=d%2526d+3.5+feats+pdf In PDF document text
    • https://vesemidibokopiz.weebly.com/uploads/1/3/4/8/134869856/20f154480aaa54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366952/normal_5f872cf5754f7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/likerajatob/17487124704.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/bastien_piano_basics_level_1_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/bostonian_prescott_mens_shoes.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/bangor_waterfront_concerts_rules.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/212dc515-8afa-4f69-92c5-57dfb9ad4158/losofikuxijifofoxin.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/oxford_dictionary_free_uptodown.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/gotapafurovajinuvokebaro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f70046c6-5cf6-4564-9ff1-8f5181948a52/lotro_guide_to_minas_tirith.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94b7ed5f-7df6-4cbd-820b-b2f54f21f01e/96409763186.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_008_off0001471a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1471A 26316 bytes
SHA-256: 4e2f8eac4c0dd595d81f99f0c4361b453fa9e14981d6751a72ae516960b4d23c
stream_009_off000176ad.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x176AD 6504 bytes
SHA-256: 24360cdb7014ada8aa5e6f1d3277a2d71ef7b6d1dc3bf288ea9a040c472e669a
font_00_sfnt_off0000d8e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E4 7516 bytes
SHA-256: 075fb9e944568478c94e38805233b1125798969703103af32602e568e806d8e3
font_01_sfnt_off0000ec6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6A 3148 bytes
SHA-256: a277baa0363301820e691350cb860598f83a55ab5f470b69e31f1ace31f899c5
font_02_sfnt_off0000f7a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A9 4156 bytes
SHA-256: 9253c4ec90eb8b217ae91b3aef6412788d3d1419415539c5cfb70110cf842fd1
font_03_sfnt_off00010597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10597 6280 bytes
SHA-256: 9b26e63dddb061148d2096f8a3abd9ddbfbe7663dcfe2e6edc24d1b84c1ba01d
font_04_sfnt_off00011501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11501 16840 bytes
SHA-256: 97a7682dd6e6635648a3ce478330c98fa81d71ba6c5077c350d5d49864258c01

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