Malicious PDF — malware analysis report

Static analysis result for SHA-256 f734e3e97e2863fa…

MALICIOUS

PDF

78.8 KB Created: 2021-03-21 08:45:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 997232ca739493da084acbd118367cb3 SHA-1: 7850740abecbe5c21e4b7e458c9447e5a5d237e5 SHA-256: f734e3e97e2863faa07d75d77469c4316230315f5450e8b3881147bc736991c5
184 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to known malicious redirectors or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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 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://dafemum.ru/strik?utm_term=fundamentals+of+search+and+rescue+download In PDF document text
    • https://dijajogid.weebly.com/uploads/1/3/0/8/130874349/e2640cb13eb7d4.pdfIn PDF document text
    • https://zesoxomilojul.weebly.com/uploads/1/3/4/0/134018604/5854348.pdfIn PDF document text
    • http://love-your-lips.online/2008_jeep_grand_cherokee_reliability_issuesru23h.pdfIn PDF document text
    • https://kowalarezanir.weebly.com/uploads/1/3/1/4/131438161/7904259.pdfIn PDF document text
    • http://leree6.club/hamilton_beach_countertop_convection_oven_rotisserie_model_31105f18yl.pdfIn PDF document text
    • http://akb54.ru/5364817937271hhf.pdfIn PDF document text
    • https://sudarotabodubig.weebly.com/uploads/1/3/1/4/131407445/togexapixa.pdfIn PDF document text
    • http://zdorovienashevse.xyz/how_to_get_blackheads_out_of_your_ear_by_yourselfbv0oi.pdfIn PDF document text
    • https://nodirodenesubob.weebly.com/uploads/1/3/5/9/135986245/tejolafoki.pdfIn PDF document text
    • http://copyrightshelpcenter.com/43481668237wegoe.pdfIn PDF document text
    • http://minuette.me/mubirokukofolugezu2yyp.pdfIn PDF document text
    • https://pumavamevimi.weebly.com/uploads/1/3/5/3/135391045/vebej.pdfIn PDF document text
    • https://kinigapiluxuke.weebly.com/uploads/1/3/4/8/134863840/9014639.pdfIn PDF document text
    • http://fruit-ita.fun/985680194150vnh1.pdfIn PDF document text
    • http://razvivatel.blog/far_east_fruit_crossword_answers4gk1.pdfIn PDF document text
    • http://eurofamily.pro/neworemixewenujaneniduasjr3.pdfIn PDF document text
    • http://creditreportus.info/galavarejokiz9p7qn.pdfIn PDF document text
    • http://trackengine.host/25811978541apiox.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://uploads.strikinglycdn.com/files/4e03fc76-83d9-482f-a6f5-f53797925038/41035996829.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a64347ff-b069-4923-86d8-69503f43d50c/what_is_norse_mythology_all_about_essay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c16b3ec7-cbe8-4151-9e4c-021f47d4f7f7/what_is_a_literature_review_paper_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02f6b785-24b5-4245-9d2c-db7e65f6aebf/mapidemilur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ea6d444-25f9-448a-bda7-47bd624d6b62/how_to_train_your_dragon_2_eret.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_off0000e0f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F7 5144 bytes
SHA-256: 6c18e8d9129bbdff7c7d82abe8efd6ed8dd36f6eac977404b206ca67006188a0
font_01_sfnt_off0000f250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF250 13896 bytes
SHA-256: 4dc64b8c6539544e05f1024121b1fc61544e17ee4a7c8102deb29de0a2aca502
font_02_sfnt_off00011f07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F07 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34