Malicious PDF — malware analysis report

Static analysis result for SHA-256 32d37565a2ecc19b…

MALICIOUS

PDF

61.2 KB Created: 2020-11-23 17:50:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b2a5d3053702bada598623dfc9517beb SHA-1: 234adf1babc417887c761863b8b4ab73a362aa15 SHA-256: 32d37565a2ecc19b5fae36b609e44232daacacd31ad3b7f5c861001d559dc0cd
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 0.9996

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://traffking.ru/123?utm_term=aws+certified+solutions+architect+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4423145/normal_5faa82a1f3c06.pdfIn PDF document text
    • https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/ac115b69bda4.pdfIn PDF document text
    • https://pirovosarelivo.weebly.com/uploads/1/3/1/4/131406751/f2784f31731ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393488/normal_5fa10daa9bac6.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/fumibitap_vekom_jopobukakiwife.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/faac80fd-a93f-4cf4-a882-4a0df4571354/14226506406.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/gold_s_gym_elliptical_350i_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/silufomojafajidosefixano.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/guidesman_flashlight_battery_replacement.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/kuxevut.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/tisujabobil.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_off0000b3e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3E3 5324 bytes
SHA-256: 0995566aee304c082e26ba0aae110fda2ccbf0383fb4be673580c48fa6b2215b
font_01_sfnt_off0000c60f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC60F 10044 bytes
SHA-256: 1aba3999286209aa050287f096ee9ec4a590871ac3f783008c3b25e3e6c5e317