Malicious PDF — malware analysis report

Static analysis result for SHA-256 a31edb45810f2dfd…

MALICIOUS

PDF

109.7 KB Created: 2021-03-24 10:58:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 6b40f601457c1a3bf560bcb890d2aa31 SHA-1: 3797400c6b5f8b3e39c64e82705de9d25b49a22c SHA-256: a31edb45810f2dfdb9c2609bf2258131232c813de8daf74cd48feb5bbb97d0eb
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'dafemum.ru'. ClamAV also detected the file as 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the nature of the redirector suggests it is designed to lure users to a malicious site, likely for phishing purposes. The embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • 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.
  • 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://dafemum.ru/wix?keyword=bdo+returning+player+guide+2019 In PDF document text
    • https://cdn.sqhk.co/zolilogifuxe/kjgKhg7/instagram_tags_for_model_photography.pdfIn PDF document text
    • http://evromotors.net/what_is_sense_of_touchmk57s.pdfIn PDF document text
    • https://cdn.sqhk.co/xikotoxerov/khjdif8/us_gas_price_history_by_year.pdfIn PDF document text
    • https://cdn.sqhk.co/bogovureg/4jcjcie/verizon_call_filter_app_won_t_open.pdfIn PDF document text
    • http://bigtittybella.com/tintins_friend_from_china_who_debuted_in_19366gi04.pdfIn PDF document text
    • https://cdn.sqhk.co/sokulutesi/agdqhfm/new_york_city_fc_stadium_plans.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379241/normal_603aaf5fb5084.pdfIn PDF document text
    • https://cdn.sqhk.co/xeposetuge/2hf9Gje/super_ninja_race_3d_running_turtle_game_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369912/normal_5fe333b240bb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393209/normal_6043c0de42517.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/jakujakula/86789709620.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6d64f9d-6d62-4597-a744-4fed21070d23/sportspower_trampolines_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c98e5f3-9c16-4d56-8f44-6e56ec768716/8002494146.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b0665e3-6938-4bf3-8331-10311f79a9f3/what_does_mild_developmental_delay_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/83371946969.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/zawujul.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10994 23928 bytes
SHA-256: f08ce21c1e1a9a12c3ae75f56cf246f910d29405842d4b1976cb0b758ac4dde2
font_01_sfnt_off00015602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15602 5464 bytes
SHA-256: 8a716cddb67217e234dd490a58e430330c81ab52f8a8851245ed13d451169a4c
font_02_sfnt_off000168a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168A5 2904 bytes
SHA-256: a0fe2daada3f9176e98494b10909635b23cf183d11683fbcbfedfb157e9710fb
font_03_sfnt_off0001749a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1749A 11060 bytes
SHA-256: b558d232ac1d0c744e89b1f2ae1816d8077ab4e24355242058f88777cf299764
font_04_sfnt_off00019a6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19A6A 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

Open this report in the interactive analyzer, or submit your own file for analysis.