Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3a7ff9997068c87…

MALICIOUS

PDF

75.0 KB Created: 2021-01-19 17:35:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 29a32f6db85d2a8ab7dc7d52553ec533 SHA-1: dff376fb8c08dab7702687c01121ecf554884c82 SHA-256: e3a7ff9997068c8778c1e66f577da259d5d37071918ef8f1cdf69621448299bd
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary external URIs points to 'trafffi.ru', suggesting a malicious redirection or phishing attempt. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links indicate an attempt to direct users to potentially harmful websites, aligning with phishing or SEO manipulation tactics.

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 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.
  • 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://trafffi.ru/123?utm_term=the+cay+movie+cast PDF link annotation
    • https://fobopogukigu.weebly.com/uploads/1/3/4/3/134366855/xajeriboralonitu.pdfIn PDF document text
    • https://cdn.sqhk.co/sepetuvab/I0rijV5/talk_chat_mod_apk.pdfIn PDF document text
    • https://site-1176993.mozfiles.com/files/1176993/bose_quietcomfort_35_series_ii.pdfIn PDF document text
    • https://cdn.sqhk.co/supopareso/cuhhogh/vitesifizugatemab.pdfIn PDF document text
    • https://vetasokimatajed.weebly.com/uploads/1/3/5/2/135296406/jekelewupusodilinije.pdfIn PDF document text
    • https://site-1174959.mozfiles.com/files/1174959/guwexolukiwejogagi.pdfIn PDF document text
    • https://bonesinidojesu.weebly.com/uploads/1/3/4/5/134591006/jokunukubi-dedan.pdfIn PDF document text
    • https://cdn.sqhk.co/metusoteliza/bFeheie/survival_craft_2_free_download_windows_10.pdfIn PDF document text
    • https://site-1176223.mozfiles.com/files/1176223/darwin_s_yearbook_full_episode_dailymotion.pdfIn PDF document text
    • https://kaxalosenawa.weebly.com/uploads/1/3/4/5/134576513/susirifadad.pdfIn PDF document text
    • https://site-1173509.mozfiles.com/files/1173509/3708078875.pdfIn PDF document text
    • https://timowerudep.weebly.com/uploads/1/3/0/7/130738780/8360472.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/nupezotu.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/kowupepefemuji.pdfIn PDF document text
    • https://s3.amazonaws.com/juvosi/35611789153.pdfIn PDF document text
    • https://s3.amazonaws.com/fonibinaraj/tds_interest_calculation_in_excel_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/random_weapon_of_nulgath_drop_rate.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/bats_locate_food_using_sound_waves.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/lidividodutepiju.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_off0000e8a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A9 5020 bytes
SHA-256: e78c3076fdffa6fcd4f57625031f0b280d628b9943e0b7af813b266dd3594d5c
font_01_sfnt_off0000f9aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AA 11032 bytes
SHA-256: 8f847a41dbd1eddab202ba0344109e4d2e48be753cee8340bb1a4a76d771b9e5

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