Malicious PDF — malware analysis report

Static analysis result for SHA-256 56886570601ce48e…

MALICIOUS

PDF

82.4 KB Created: 2021-03-05 02:40:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a17951b1d57fd35cf80a37f8040a67bf SHA-1: 2f12651aa743f11751dfe955f394ac27b53ba1fd SHA-256: 56886570601ce48eb47ac68e484a95c1ee443ee2aa38d72280e94b8dbf207227
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains and potentially part of a link farm or phishing campaign. The embedded URLs and the heuristic firings strongly suggest an attempt to redirect users to malicious websites.

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://maypoin.ru/strik?utm_term=food+without+grains+and+sugar PDF link annotation
    • https://cdn.sqhk.co/womawuxinuge/iiibFUk/scream_go_ninja.pdfIn PDF document text
    • https://putojedenavaxo.weebly.com/uploads/1/3/2/6/132683165/tageluk-podapuxulufe-dunasikapu.pdfIn PDF document text
    • https://cdn.sqhk.co/xudevekelefe/jghbOjj/bewujoxi.pdfIn PDF document text
    • https://bazuxenulasiv.weebly.com/uploads/1/3/0/7/130740357/1337748.pdfIn PDF document text
    • https://cdn.sqhk.co/tisufupujeli/ibjba5Q/pinata_store_cottonwood_mall.pdfIn PDF document text
    • https://cdn.sqhk.co/wovupeni/hjgexjg/64926826810.pdfIn PDF document text
    • https://cdn.sqhk.co/sojowidaz/3lqMWFx/gunivu.pdfIn PDF document text
    • https://jepunitapo.weebly.com/uploads/1/3/1/0/131070437/gevamazedapa-zepibetixu-rideranud-diworisikubumos.pdfIn PDF document text
    • https://cdn.sqhk.co/mumesimasozo/hrsgfia/65739726576.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopiroxab/ftICiiO/show_boat_drive_in_houston.pdfIn PDF document text
    • https://cdn.sqhk.co/sipobufiw/ihiimVP/lirekiwi.pdfIn PDF document text
    • https://cdn.sqhk.co/tobizopowebo/cIge1Ir/florida_man_finds_snake_in_toilet.pdfIn PDF document text
    • https://denogowozule.weebly.com/uploads/1/3/5/3/135326247/zibetefolirojefikut.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://s3.amazonaws.com/mesixadelomomo/risopitowalov.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/46052056101.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/cutting_edge_3rd_edition_elementary_workbook.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/namov.pdfIn PDF document text
    • https://84daacc9-7e90-4c5d-b1ed-526950900c49.filesusr.com/ugd/73f3b0_400b29b9c45d42d2933ac4af3c93e39a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/getizar/java_8_update_221_64_bit.pdfIn PDF document text
    • https://ed36ca5d-e6e9-4caf-8bbb-3a8af5cfee16.filesusr.com/ugd/971556_313b41cf18dd489fbb12c156e70ddfb4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/getigorunejanivajuv.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_off0000fa18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA18 4864 bytes
SHA-256: 9b9b2a91b469bee8b8fd6055c3449e9285d667ffffdbde27d7234e230700148a
font_01_sfnt_off00010aa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA4 10424 bytes
SHA-256: 4fa2c34534819fe549a43f8e02c6aa4708942d0675c67d312189408f7888276c
font_02_sfnt_off00012e2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E2A 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378