Malicious PDF — malware analysis report

Static analysis result for SHA-256 46986f39aa0e619c…

MALICIOUS

PDF

67.4 KB Created: 2021-05-30 05:53:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 41c0fe3e21f0ab52777b37f437ce814a SHA-1: 10c2b94acd6ff3f2b1d822afd3bbc85edafcd65b SHA-256: 46986f39aa0e619cebb94446a07b16d8ecdfb64b65c0617de6b7b3a50ce635d4
186 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 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gimoguvi.ru/strik?utm_term=theme+from+schindler%2527s+list+violin+sheet+music+imslp PDF link annotation
    • https://jafedemigizol.weebly.com/uploads/1/3/4/5/134588438/790828.pdfIn PDF document text
    • https://dexatasudawuge.weebly.com/uploads/1/3/4/4/134477966/gemoxo.pdfIn PDF document text
    • https://bikojeril.weebly.com/uploads/1/3/3/9/133999271/8635970.pdfIn PDF document text
    • https://kepijifawobi.weebly.com/uploads/1/3/5/3/135388201/e3e77eda8f4.pdfIn PDF document text
    • https://femomupine.weebly.com/uploads/1/3/4/4/134458898/sojoralaw-vuxuwikizukaso.pdfIn PDF document text
    • https://bofuvuwowu.weebly.com/uploads/1/3/1/8/131856225/7623512.pdfIn PDF document text
    • https://kitaterikobojim.weebly.com/uploads/1/3/0/9/130969176/02a5fe.pdfIn PDF document text
    • https://kesizizuju.weebly.com/uploads/1/3/4/3/134384541/zifedufobutelaja.pdfIn PDF document text
    • https://farunigi.weebly.com/uploads/1/3/4/7/134716297/1028416.pdfIn PDF document text
    • https://rodugetimevo.weebly.com/uploads/1/3/1/4/131407281/7028906.pdfIn PDF document text
    • https://lubikumak.weebly.com/uploads/1/3/1/4/131453733/zelajedogepumu_zapofenenab_danuwimebugiwi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373992/normal_5ff22fc433ab9.pdfIn PDF document text
    • https://vusubidasezojix.weebly.com/uploads/1/3/5/3/135399418/a8a827a0288.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479916/normal_606429f6e84d5.pdfIn PDF document text
    • https://wivusogonelom.weebly.com/uploads/1/3/5/3/135310870/4539265.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/9a891b90-13aa-446c-96ea-e6ba0ac3306f/how_to_describe_sunset_sunrise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/269b57f9-4e86-4532-b6f4-36773575e7b4/leaf_legged_bug_control.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/075cac25-6291-4f8a-b504-910136552f88/linem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5a675a9-1de6-42c2-9c10-5a6519452afe/34986780232.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea25963d-23b9-4c7f-a581-5374b29696d7/wufebagimulirakapumibixip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2eaca065-609e-4ee9-ae50-0d2c915ef639/how_to_connect_to_anker_a7908.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f2ad184-7dee-4933-96c6-b8a996f17fb9/davis_industries_model_dm-22_22_magnum_derringer.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_off0000ca51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA51 5228 bytes
SHA-256: 7ab115f7c2497e8e706e0544fc272e35693de6f75393f012c8b86053b9034174
font_01_sfnt_off0000dc05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC05 10916 bytes
SHA-256: a22af40ad42323765857563d05fe3873d3d755d3478b945c9f1563e907330810