Malicious PDF — malware analysis report

Static analysis result for SHA-256 0082e91e145a25cf…

MALICIOUS

PDF

79.9 KB Created: 2021-03-24 08:50:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 1dd5b087e57b4e9bae308c1b68a9f691 SHA-1: ab2622ec5cba72aeb85cbce224a4acbcfdf64f86 SHA-256: 0082e91e145a25cfe6162a7a1202dae6f40cb7be3a8c6b7baf4bfd88cc2e051d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to link farms on disposable hosting, suggesting a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the presence of external URIs and the link farm heuristic point towards a phishing attack, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://soxebez.ru/wix?keyword=ridgid+pressure+washer+surface+cleaner PDF link annotation
    • http://fiwovoxas.22web.org/58203675918.pdfIn PDF document text
    • http://mebowakop.22web.org/sedizuzeka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_605704d68f477.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505837/normal_6022411eac8c2.pdfIn PDF document text
    • https://sulipebi.weebly.com/uploads/1/3/0/7/130739254/ce360c2af2d879.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419410/normal_600bafad46434.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455403/normal_6012db8a7939c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368503/normal_5fcf21873d1f0.pdfIn PDF document text
    • http://muvezada.iblogger.org/directors_strategic_report_examples.pdfIn PDF document text
    • https://noxagutut.weebly.com/uploads/1/3/4/4/134483949/jinero-tizuf-voxifopomafama-tewudur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luxopemuvoxu.rf.gd/bissell_little_green_proheat_carpet_cleaning_machine_2513g_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/186d7dca-85aa-440c-9f23-68883adf63d4/16197582895.pdfIn PDF document text
    • https://83d7d1d1-3661-4158-a2cc-78aa4aa39d08.filesusr.com/ugd/163759_f7fbfc7a57634a8297e5c0050e668842.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8c4f18a-4259-4861-85d5-0fc531011bac/88136022948.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de2a95b6-4824-4696-b2ad-fbe66a10e7a6/ncaa_division_2_conference_standings.pdfIn PDF document text
    • https://fb79ad55-22b5-4823-9538-35c71bbbd514.filesusr.com/ugd/ea423f_d84aa7026e0645c8b3f35a5352c684bb.pdf?index=trueIn PDF document text
    • https://332892e0-6a2b-40ad-946e-e7c92c61c867.filesusr.com/ugd/3e5d97_b23a7676908c4b3db795103ade166556.pdf?index=trueIn PDF document text
    • http://zavukazena.epizy.com/unreliable_narrator_worksheet.pdfIn PDF document text
    • http://zulorokufejepa.rf.gd/kuxaluletenen.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_off0000fa66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA66 5516 bytes
SHA-256: 3a2a3aebe4db1da66221206c4eed9b68c43fd8ac5eba020339c4a191a276db12
font_01_sfnt_off00010d40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D40 11124 bytes
SHA-256: ec955685d4375a12155607a75d5e94281b3fb568cb9922185e5c716167d1df10

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