Malicious PDF — malware analysis report

Static analysis result for SHA-256 41da943bf417e0e1…

MALICIOUS

PDF

78.8 KB Created: 2021-04-30 22:20:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 24e55ba8999c31960a55cf2c8af0b897 SHA-1: 11e90ad92370f8f2ce06d73f7c520b6856d0ee1a SHA-256: 41da943bf417e0e1697e57d9db3347d90260906c3974fae6746c7769e1531717
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs, one of which points to a suspicious domain ('bologen.ru') and is flagged by heuristics as an external URI. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site.

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
  • 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://bologen.ru/strik?utm_term=simplicity+lawn+tractor+problems PDF link annotation
    • http://palaxofivuleduj.medianewsonline.com/34641573725.pdfIn PDF document text
    • http://boraguw.medianewsonline.com/what_is_the_old_scofield_study_bible.pdfIn PDF document text
    • http://talajifit.mywebcommunity.org/samsung_remote_not_working_right.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369936/normal_601ca57d36e2d.pdfIn PDF document text
    • https://gorelafuxom.weebly.com/uploads/1/3/4/4/134497365/63b4e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413244/normal_605a6c34dbd14.pdfIn PDF document text
    • http://fekowepiz.mywebcommunity.org/contoh_kasus_amdal.pdfIn PDF document text
    • https://golisarupu.weebly.com/uploads/1/3/5/3/135317681/vewixebala.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404969/normal_605e02f2ce741.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401545/normal_60603360bf246.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6e06fe2-1110-40e4-a598-822fb6c684e9/lubenevatelas.pdfIn PDF document text
    • http://favamolutamugiz.rf.gd/98428363306.pdfIn PDF document text
    • https://dd7ee03d-3646-4e01-a1e1-4c0a7e2c9e57.filesusr.com/ugd/d7ba0f_d238a55f0eb34968bb6c3b537ba9e7c8.pdf?index=trueIn PDF document text
    • https://c79dcb07-c1b1-4d84-a600-6417d8bf0f54.filesusr.com/ugd/edce22_9bea9c3dbc7747499711e67b82a6d48a.pdf?index=trueIn PDF document text
    • http://nosigegu.onlinewebshop.net/tazarewarirefotemado.pdfIn PDF document text
    • http://gesinofafag.epizy.com/what_is_the_new_and_old_testament.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b88af6f-b966-4ff7-adf4-7121fbdce236/how_do_i_contact_buffalo_wild_wings_corporate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9152ca09-caf5-4c3e-bae1-3c6bec9a7c75/70379168839.pdfIn PDF document text
    • https://bff5fdab-9fd0-4670-908b-a1308bb5a9cb.filesusr.com/ugd/227d0f_5902f7ce94474601b394e896eccffb42.pdf?index=trueIn PDF document text
    • https://a2c67b61-a01d-4053-b7ad-f1487bca8054.filesusr.com/ugd/24853a_af80a6837dea4214871c4837ef5bf7f6.pdf?index=trueIn PDF document text
    • https://0f424234-9c27-4462-a606-4b2ccecf17d8.filesusr.com/ugd/b42a09_ae9688c37cab4684881c5f2c7ec098dc.pdf?index=trueIn PDF document text
    • http://misosemarimo.rf.gd/15283824497.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16c0c4c5-05ca-4522-85d1-967ba9e4dec3/crossfit_level_1_training_guide_hard_copy.pdfIn PDF document text
    • http://gazisuwak.rf.gd/muxagikikisolipi.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_off0000f576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF576 5516 bytes
SHA-256: e1ea7c379b203bd0307308528285ce5059ba478c17a3f4cbd6f71b1ee8c4712c
font_01_sfnt_off00010830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10830 11044 bytes
SHA-256: 7778eda8fb2671214b2dafd8521052752672121e6a3991a60fa5ab21d4d3a633