Malicious PDF — malware analysis report

Static analysis result for SHA-256 df7e294515040b42…

MALICIOUS

PDF

104.4 KB Created: 2021-03-19 21:42:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c8bf82687bfeab985365e3f5376678cc SHA-1: a12b4d21dd6d00045ee5bf99386b9a58d5deb739 SHA-256: df7e294515040b42cf273b30231ed87e47e36739c4b6b0f0d489c80704ca0ed0
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated a high probability of maliciousness. It contains a large number of external links, with at least two identified as potentially malicious or part of a link farm. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of numerous external links suggests a phishing or SEO spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://maypoin.ru/award?keyword=amaranthus+viridis+pdf PDF link annotation
    • http://zokiwedilar.mypressonline.com/why_is_my_carbon_monoxide_alarm_flashing_red.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483081/normal_6054bf4f44106.pdfIn PDF document text
    • http://garanibukumom.scienceontheweb.net/togopamofagubuwivo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464330/normal_5fcf2b9f4a9e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369802/normal_6032e1b033d4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376125/normal_5fedc68d2efa9.pdfIn PDF document text
    • https://piborubaladedos.weebly.com/uploads/1/3/4/7/134764427/5301f065c89bd87.pdfIn PDF document text
    • https://kezexawu.weebly.com/uploads/1/3/0/8/130814062/3237238.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/vebisop/5114380101.pdfIn PDF document text
    • http://bivojeda.atwebpages.com/sql_interview_questions_and_answers_for_java_developers.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/bdmobi._com_song.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/imperative_programming_bsc_it_book.pdfIn PDF document text
    • https://0ecef3a8-5193-4df1-8dcb-1b7dd0f2be2a.filesusr.com/ugd/e6092c_1d93c83207a84f83bbe3c55b69ec1a7a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/77667605813.pdfIn PDF document text
    • https://cf336f9a-6a79-4542-9269-5b62d6eb69dd.filesusr.com/ugd/1daf83_a450f8e0dfd04da78e27abb734be7702.pdf?index=trueIn PDF document text
    • https://7afd96e6-4611-46d4-9b98-d111b897c281.filesusr.com/ugd/154221_1b4a5250290f4021a3a3d7809a1fbdf2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/geraromu/boogerman_sega_rom.pdfIn PDF document text
    • https://e0bfa911-60eb-4c53-bd8d-ceec25156dfb.filesusr.com/ugd/0a052f_f90a94e36f094f42adbedc69444b92f0.pdf?index=trueIn PDF document text
    • https://97d49ff2-d914-4ae4-8ac8-5e5cf5f77cad.filesusr.com/ugd/6350c7_76cc8c70221743c2be91ff83ece2ddff.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15829 5296 bytes
SHA-256: 73e9eff912414368d717627f07524a37a06cc2083cb7854b9a6eddd1961e496d
font_01_sfnt_off00016a08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A08 13368 bytes
SHA-256: d876e1f3342c09346da146426b0cb3590a7bfbd13c772a18b5b01bd107c6f1bb

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