Malicious PDF — malware analysis report

Static analysis result for SHA-256 b828aa58dde3b6be…

MALICIOUS

PDF

92.8 KB Created: 2021-04-15 03:22:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: a74d9aecfe83b60f896e5dc684f92ba5 SHA-1: d90b8d6626e698b7de4ca6b7bb2d4b6416d758e3 SHA-256: b828aa58dde3b6be9fa18d63284022c1486d96c8e297055a1adb551a79ac0f57
134 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, including one pointing to 'soxebez.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to a 'Psychonaut field manual' and includes urgency language, reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://soxebez.ru/strik?utm_term=psychonaut+field+manual PDF link annotation
    • http://shothard.site/nitijogogiwecxnxl.pdfIn PDF document text
    • https://fidagavatijib.weebly.com/uploads/1/3/1/3/131398583/wuzolokitemag.pdfIn PDF document text
    • http://premiumpornclips.com/veresema5l2un.pdfIn PDF document text
    • http://serviceforyou.site/pengenalan_agama_islamutky0.pdfIn PDF document text
    • http://skidki-day.shop/kojaliudvm7.pdfIn PDF document text
    • https://mazoguwikite.weebly.com/uploads/1/3/4/6/134614920/bojelifowezep.pdfIn PDF document text
    • https://tojuxumisadef.weebly.com/uploads/1/3/4/7/134714483/e1368c344a6dd.pdfIn PDF document text
    • http://bettyloustintruckbbq.com/59207099938fynl6.pdfIn PDF document text
    • https://cdn.sqhk.co/remonupode/dEgiB6H/vikorazesagiw.pdfIn PDF document text
    • https://nukilowemetidu.weebly.com/uploads/1/3/4/7/134712118/lodowisenofu.pdfIn PDF document text
    • http://metuzupa.iblogger.org/baxorem.pdfIn PDF document text
    • http://appletopshop.ru/bhai_bolte_dj_remix_songhf8bm.pdfIn PDF document text
    • http://teksol.xyz/how_to_write_a_test_case_example47f9q.pdfIn PDF document text
    • http://216tilford.com/13665244914179ju.pdfIn PDF document text
    • https://runogobikekeg.weebly.com/uploads/1/3/5/3/135350887/rubewepogu_zuferaj_mirugupikad_peledev.pdfIn PDF document text
    • https://cdn.sqhk.co/fugolamudara/VgjuDrE/zombie_party_decorations.pdfIn PDF document text
    • http://opt15.ru/sagojagaxufftycq.pdfIn PDF document text
    • http://sushibara.net/dell_e6410_specs_i7oiyyt.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
    • http://dexifenila.rf.gd/tafijesuko.pdfIn PDF document text
    • http://bexadujozopu.epizy.com/95351568861.pdfIn PDF document text
    • http://gifazewuki.epizy.com/tratamiento_nutricional_para_esclerosis_multiple.pdfIn PDF document text
    • http://veguxakafopuvix.epizy.com/19445991174.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A19 5152 bytes
SHA-256: f04c1b49be19baadc00e38be7712a8f590ddf4cf4745efe153492814c76bbbf0
font_01_sfnt_off00011b6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B6F 11368 bytes
SHA-256: ff57aaf6293bf78d5ebb41279a2ab5f5dd31ce037da5e407ef9fcae5852077a1
font_02_sfnt_off00014276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14276 16096 bytes
SHA-256: 71ee8c2d032dbc68e2b9b926e3cc4a38fd2b89f2cf2fdd4b30728042a943812d
font_03_sfnt_off00015740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15740 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e