Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf6e00e34fbcfbdb…

MALICIOUS

PDF

88.5 KB Created: 2021-03-11 21:52:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: fdebce9d17eac05a3dbb53cc686e29e7 SHA-1: d60383f6bc69fb0a4c0e53fc3181dd444c9c5e5d SHA-256: cf6e00e34fbcfbdb654cea0bb2641feb7081c031313bb3f8c3584a69410c0888
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a large number of embedded links, with several heuristics indicating it is a link farm designed to direct users to potentially malicious sites. One URL, 'https://crophysi.ru/wix?keyword=xmodgames+no+root+apk', is specifically flagged as a malicious redirector. The ClamAV detection and ML classifier further support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=xmodgames+no+root+apk In PDF document text
    • https://fetatoba.weebly.com/uploads/1/3/4/6/134689412/lulazuzuwak_maxad.pdfIn PDF document text
    • https://nurosizakudagag.weebly.com/uploads/1/3/4/6/134699554/5596345.pdfIn PDF document text
    • http://mybatut.store/458055914612fpzd.pdfIn PDF document text
    • https://benuwefijazom.weebly.com/uploads/1/3/4/8/134897428/6842101.pdfIn PDF document text
    • http://nigasheff.xyz/george_foreman_ggr50b_indoor_outdoor_grill_reviewtkf51.pdfIn PDF document text
    • https://gonedosi.weebly.com/uploads/1/3/4/7/134730609/kukafowuxu.pdfIn PDF document text
    • http://jilet2.club/96425202578yocuc.pdfIn PDF document text
    • https://kufoxigokutef.weebly.com/uploads/1/3/1/8/131856815/lovusijumone.pdfIn PDF document text
    • https://redelonoxoti.weebly.com/uploads/1/3/1/6/131606094/sekudigowof_rasif_foxofu.pdfIn PDF document text
    • https://davabodijesofid.weebly.com/uploads/1/3/4/4/134474123/2904301.pdfIn PDF document text
    • https://detofupupe.weebly.com/uploads/1/3/1/3/131384021/dilovevev.pdfIn PDF document text
    • http://lifeshop.pro/lifetime_54_in-ground_crank_basketball_hoop_reviewsm3jlu.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://8e0cabef-d481-4215-b437-8a5fc4e4723c.filesusr.com/ugd/f41140_2e4257d29d564269b4bdb7e80f4fd86c.pdf?index=trueIn PDF document text
    • https://87164119-88a6-4d6d-a72f-b109cf2d88b9.filesusr.com/ugd/bd0a66_274fda7caffe4624860439b088ab3dbb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/garorowa/bodejavumejalorasegexosur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39294d7b-bd88-492f-8d14-45cfa772e173/rainbow_vacuum_for_sale_australia.pdfIn PDF document text
    • https://9005a25f-7293-4a73-bb0f-bc58e8c16807.filesusr.com/ugd/e3834b_8ca1d986ca75493683774c481d15a862.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7d6655d-7cd0-4305-921a-cf592226b643/16936357293.pdfIn PDF document text
    • https://ca30e0e0-ecf2-44ab-b6a2-fe26291458be.filesusr.com/ugd/34e21e_690dc7f42e6b401da744e227eed282a5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/bukegivivon.pdfIn PDF document text
    • https://9f9bd9fa-00fe-4673-b34e-9a629881f524.filesusr.com/ugd/09273f_9efb4de7580247be9d2ebbb029559787.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/hellboy_2_imdb_parents_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/992dc177-4605-4b6b-acb4-f804a3639a3a/manual_teclado_yamaha_dgx_660_occasion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e136525-b36f-4401-b685-a36ea8e36737/93821825939.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_off000111e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E0 5028 bytes
SHA-256: a10852e6df32da2051cd0fecab4206ecf24db50381395f7ba95b88adc687f678
font_01_sfnt_off000122d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122D8 10212 bytes
SHA-256: 39c9634888633de7cf9cad51663ff271e70889ca018d8ae7ef3a8263bacdd3d6
font_02_sfnt_off000145e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145E4 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c