Malicious PDF — malware analysis report

Static analysis result for SHA-256 395494d93107f442…

MALICIOUS

PDF

70.6 KB Created: 2021-02-21 15:03:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 9de233ca2d33709994d3051c5d46fa0b SHA-1: f4b1c3958aa234ff59ff7caf12572b2773eb1d0c SHA-256: 395494d93107f4421c31e5c60797754167861eca83caef4f5ce6350c4a9be784
126 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a link farm, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=how+to+find+your+google+history+on+ipad PDF link annotation
    • https://kulabukotijol.weebly.com/uploads/1/3/4/7/134703535/jenunilakevepoz.pdfIn PDF document text
    • https://telogedibosujo.weebly.com/uploads/1/3/1/4/131438044/2c34686730e3c8c.pdfIn PDF document text
    • http://jovedarike.iblogger.org/barsega_sawan_jab_we_met_song.pdfIn PDF document text
    • https://rowusebejaron.weebly.com/uploads/1/3/1/6/131637242/9556422.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460725/normal_60256e3375420.pdfIn PDF document text
    • https://tidoxanarapora.weebly.com/uploads/1/3/2/7/132710787/zemon.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/xonobijikivo/91660329771.pdfIn PDF document text
    • http://refewededuxita.epizy.com/litinorekuxagomebagol.pdfIn PDF document text
    • http://lubozogemodusa.epizy.com/rivofisiranuz.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/android_version_for_note_8.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/dezumagajaxuragufunali.pdfIn PDF document text
    • http://sofikej.rf.gd/reaction_kenneth_cole_watches_india.pdfIn PDF document text
    • http://viladitotaxuf.epizy.com/jevijusarelolavev.pdfIn PDF document text
    • http://rixavadalut.rf.gd/tma_slope_indicator_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dafumuxitupav/rojijilus.pdfIn PDF document text
    • http://pigozezidum.rf.gd/battlelands_royale_apk_mod_money_2019.pdfIn PDF document text
    • http://javasuk.epizy.com/admission_form_meaning_in_marathi.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/vopabowoliv.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_off0000d4a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A1 5456 bytes
SHA-256: e0f1165706c6900f45238eac5c1d692cc1a56e29007f8043f126efd64387bc02
font_01_sfnt_off0000e749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE749 11132 bytes
SHA-256: 9b49c78923097b4a21cf239780d49a0f88018290d6a3d4a59ea90770cf7b6b02

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