Malicious PDF — malware analysis report

Static analysis result for SHA-256 067e79373e8c63c1…

MALICIOUS

PDF

84.7 KB Created: 2021-03-10 18:51:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c34cc15694269378765b67fcde8f950d SHA-1: 1669a552fb3c4a52db0a1ef198538034feb1cd7a SHA-256: 067e79373e8c63c1691354c29ed5e04fb42a9760441cebec9002d26e47aad9e5
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 0.9990

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://maypoin.ru/aws?utm_term=cat+genie+parts+list PDF link annotation
    • https://vujirazezada.weebly.com/uploads/1/3/2/6/132681664/molegowaberezexu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471488/normal_6018140149fe8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420745/normal_5fe7cf48cdfcd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425728/normal_5fdfbde3633c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466135/normal_5ffeb297c9bb1.pdfIn PDF document text
    • https://rawekawus.weebly.com/uploads/1/3/4/4/134467784/2662182.pdfIn PDF document text
    • https://pebawozo.weebly.com/uploads/1/3/4/8/134865175/eeb6e8be17a3.pdfIn PDF document text
    • https://wuremuzagatixob.weebly.com/uploads/1/3/4/6/134612401/wifumixilux.pdfIn PDF document text
    • https://masevaru.weebly.com/uploads/1/3/5/3/135346062/bulebazedixu.pdfIn PDF document text
    • https://wezozutu.weebly.com/uploads/1/3/4/6/134653249/vomunigurabeb.pdfIn PDF document text
    • https://kutenamig.weebly.com/uploads/1/3/0/7/130740069/vabewizikuba_gejepe.pdfIn PDF document text
    • https://xitipirobopu.weebly.com/uploads/1/3/0/8/130813988/vonogi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408176/normal_5ff16bb0bacf6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/a274ce16-9fd3-43fd-a951-605cc52a9202/bow_tie_pasta_chicken_salad_with_coleslaw_dressing.pdfIn PDF document text
    • https://56db2a4d-09ce-4ff6-a558-abb1d6727cd4.filesusr.com/ugd/003b86_90bd8543ec51477b9038c9b5d13806c0.pdf?index=trueIn PDF document text
    • https://1eba3b37-3dce-45e8-aa15-e51a58efc0fe.filesusr.com/ugd/89e37c_430444656187400e8e9059494ab8ccdc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d877af0f-e41e-4aa7-a341-cbd100f8b9a7/50916947465.pdfIn PDF document text
    • https://61249681-e2d1-4375-841a-b3723294d79c.filesusr.com/ugd/3d514e_046b0561882244a0a5caa7e9507ae469.pdf?index=trueIn PDF document text
    • https://fac30f9c-1bc3-4ff6-ac40-7ced1d2a170b.filesusr.com/ugd/3b7182_1b65334a54e945d8b4cd5739a78ad356.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/45fdf131-2eaa-45c2-bb3b-6e6970997f89/skillshare_adobe_premiere_pro_cc_2019_beginner_to_pro_tutorial.pdfIn PDF document text
    • https://5d3a3edc-1384-4eb0-a354-174dd54c13aa.filesusr.com/ugd/7f5dc5_a7b2cc6bbd1c4cc4ba352d87a3f4b3ad.pdf?index=trueIn PDF document text
    • https://8ed7b8cb-9bae-4def-ad9b-66b28cd11f91.filesusr.com/ugd/740d8c_ed231b6bbf264e5b9e61a89ea83329ab.pdf?index=trueIn PDF document text
    • https://98350ace-7ac4-4f38-a9d9-579fdad8050b.filesusr.com/ugd/9b2d9b_8f4e23efc10545188348cce59c04df47.pdf?index=trueIn PDF document text
    • https://ce2645ba-e89a-43d5-afff-5c0150757291.filesusr.com/ugd/c63dba_4cf667ba72de46959de9995f78038005.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8b7c7ba-bfa2-4940-b5bd-1b071c637823/bobafulukapudujup.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A5 4688 bytes
SHA-256: 2e26dd024498175d412f91a3adff9285ce843cae2c574899bc9ed66a3c85f79e
font_01_sfnt_off0001129b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1129B 10716 bytes
SHA-256: 16f8220b965b1fa622767af0f84c43a80e410b9752a903c7ead428e0ef77082f
font_02_sfnt_off0001375c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1375C 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3