Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3b6ccb6700fbab8…

MALICIOUS

PDF

72.1 KB Created: 2020-11-17 02:34:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df4de83997f73456ab1b04a5461b21be SHA-1: 75aed7870cdf2c702aa5a6502aed620444c7f97d SHA-256: a3b6ccb6700fbab80c7300e0066e67285922d15543c4e9a7b05b3c7227e7035a
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are hosted on suspicious domains or are part of a link farm, indicating a potential phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=2016+chrysler+300+service+manual
    • https://ralokokotozupar.weebly.com/uploads/1/3/4/3/134340958/volimobadowagon.pdf
    • https://filafibiwi.weebly.com/uploads/1/3/4/3/134316544/3995864.pdf
    • https://tufelovewojamex.weebly.com/uploads/1/3/4/3/134331554/7116bae6.pdf
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/pirefor_xasitupedi_puxevipa.pdf
    • https://nopirirog.weebly.com/uploads/1/3/4/2/134234714/rajasixajigeferidila.pdf
    • https://cdn-cms.f-static.net/uploads/4383680/normal_5f96c3fb8fb58.pdf
    • https://woninulanomawij.weebly.com/uploads/1/3/4/6/134670754/rivobagodab.pdf
    • https://saniruguroxi.weebly.com/uploads/1/3/4/5/134585545/letokipenure.pdf
    • https://sajosapisede.weebly.com/uploads/1/3/4/3/134344890/xekola.pdf
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/9272085.pdf
    • https://cdn-cms.f-static.net/uploads/4425229/normal_5fabc8c66c3e8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tenoxitonipuw/2019_frc_game_manual.pdf
    • https://s3.amazonaws.com/puretulenuza/73701679606.pdf
    • https://s3.amazonaws.com/xunilukegez/febiriza.pdf
    • https://s3.amazonaws.com/voxulija/32115659810.pdf
    • https://s3.amazonaws.com/jazamerijekufol/jakamagedazozobagivatu.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_off0000d651.bin
236d0990cf1100213facbdaca3f3d7cbf9ee2fad56507d61d94e60d1340c1e68
pdf-font-stream PDF embedded font (sfnt) at offset 0xD651 5748 bytes
font_01_sfnt_off0000e9c2.bin
122f472cfe72bbf8aacc845117e76646dc7c357bb106295986708ed77821e5aa
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C2 12880 bytes