Malicious PDF — malware analysis report

Static analysis result for SHA-256 72d12224f07a4d98…

MALICIOUS

PDF

83.8 KB Created: 2021-01-03 05:42:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 06315f318df76ba0fe50c553ebac0095 SHA-1: ef41d2499859cc6661fb672bae552ec3a39f42e7 SHA-256: 72d12224f07a4d98b1f6e8e73c63bce9777999514d201c88e7b0730dae083d81
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://trafffe.ru/123?utm_term=aristotle+complete+works+barnes+pdf PDF link annotation
    • https://jikigalogadod.weebly.com/uploads/1/3/4/6/134647375/e8815c6cc2ca34.pdfIn PDF document text
    • https://bavexopifepixab.weebly.com/uploads/1/3/4/6/134683122/2138825.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/nuxulikiwab/wedding_album_background_psd.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/kreg_kma2685_circular_saw_guide_review.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/axios_file_blob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/704b593f-d1db-480d-88b5-f4b0402de55d/35253550936.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/dalawixafepajesugebixugo.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/action_full_crack_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/baba_koto_din_dekhini_tomay_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/courses_offered_at_makerere_university.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/effluent_limitations_guidelines_and_standards.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/kapifolexizewa.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001064e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1064E 5588 bytes
SHA-256: bec781b3f41bf9817d79da973219007866c7bb905d55069cebb44d1d40b9ff3a
font_01_sfnt_off00011946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11946 11928 bytes
SHA-256: 60000d1b3d833593a4844fe21ea8ba1ce289368186e0011d0ef991aa0ebc67d3