Malicious PDF — malware analysis report

Static analysis result for SHA-256 25fc98fff659ae6d…

MALICIOUS

PDF

79.2 KB Created: 2021-05-23 13:00:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 6141c5e4dbcaaf935ded056de6e5c8ec SHA-1: 3cf041b1755c2d587eef3743cfd8c0dfe8a63e8a SHA-256: 25fc98fff659ae6dd41e751f23b2504b618b27b4f43ebd4bc2e069e56945ac39
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains an embedded URL that leads to a domain associated with malicious activity, likely serving as a lure for users searching for information. The document body, though heavily obfuscated, appears to contain text related to search queries, reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/strik?utm_term=what+is+the+thesis+statement+in+i+have+a+dream+speech PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446260/normal_606ba5dfb6c8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368976/normal_5fd25385c1b2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413363/normal_5fd87694dafee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454301/normal_6046efb75c2b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426686/normal_604ca0f3d2cb3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391335/normal_5fee0f9b2eba1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422135/normal_600c668a10842.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/kovezux/4562394703.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/21047052045.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/31803086289.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/dabivonewujujuzewajinife.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/which_book_is_best_for_speaking_english_fluently.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/81737119261.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18131c21-b11c-4516-9f23-146d58330c1a/vopopixakofa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be661236-1752-485c-a966-74d44ca4ae91/sentence_structure_rules_in_french.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/coliforms_in_well_water_nova_scotia.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/mogadijakobimalogejilim.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/fesodukepudez.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/avital_remote_start_ce0889_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb50874f-5ca6-4811-828d-8d0747e4a544/zenumekuvorekudowona.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27932aef-fa42-4c1a-b60d-7e949bacaa15/a_moment_like_this_lyrics_kelly.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_off0000eb68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB68 5032 bytes
SHA-256: 93132ef4cf4128f48c94d4da68d84e28a4d956f63a01e87abde369d74daf99a8
font_01_sfnt_off0000fc5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5D 10728 bytes
SHA-256: d83dc043a013e5fef886cd36440fb17d123c9aa2b90c63dfeed01e20128e6089
font_02_sfnt_off000120e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E8 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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