Malicious PDF — malware analysis report

Static analysis result for SHA-256 45d765da96469e64…

MALICIOUS

PDF

75.0 KB Created: 2021-03-19 05:34:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ec5740857496b15429e9487467cbd417 SHA-1: 464e0b5f5d4cecc70358988724684d37c82a16d3 SHA-256: 45d765da96469e64e2376f748e963d13fc8be16ebedbc9fec6e9efa2f7ab8406
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://dafemum.ru/strik?utm_term=el+pollo+loco+chicken+bowl+nutrition PDF link annotation
    • https://libadelalisam.weebly.com/uploads/1/3/4/5/134579317/parowutedir_fipajulepifasi_bunuz_kekajapelakofaz.pdfIn PDF document text
    • https://jabexigiji.weebly.com/uploads/1/3/2/6/132695602/ravivusazi.pdfIn PDF document text
    • https://cdn.sqhk.co/mujexoxa/gdvSZjc/panupopidoviwijijaxo.pdfIn PDF document text
    • http://jukekabotika.22web.org/96075481690.pdfIn PDF document text
    • https://zarojapejafaro.weebly.com/uploads/1/3/5/3/135347044/6125221.pdfIn PDF document text
    • https://silavetej.weebly.com/uploads/1/3/5/3/135314504/f166fb43cc.pdfIn PDF document text
    • https://pubodepilup.weebly.com/uploads/1/3/1/4/131406337/791345cdd0a.pdfIn PDF document text
    • http://jiwepaxitibo.iblogger.org/xalizemopigubaremu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447658/normal_6034c8fc54877.pdfIn PDF document text
    • https://titoboxe.weebly.com/uploads/1/3/0/8/130874676/govomipetos_puvesixizebipi_ruxubopunuwedov_witolike.pdfIn PDF document text
    • https://cdn.sqhk.co/vilonunufuk/hy7ibao/old_slot_machines_for_sale_in_las_vegas.pdfIn PDF document text
    • https://zinaxavum.weebly.com/uploads/1/3/4/3/134354277/fuguk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456393/normal_5ff54dee2c294.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369643/normal_6028c1e2c0a4a.pdfIn PDF document text
    • https://gojaxuwawozupu.weebly.com/uploads/1/3/1/0/131070912/f8594698e62da.pdfIn PDF document text
    • https://tidukunetubuf.weebly.com/uploads/1/3/2/7/132710673/01b8efad98f621.pdfIn PDF document text
    • https://cdn.sqhk.co/zexetiminav/yhbKghJ/boston_street_map.pdfIn PDF document text
    • https://cdn.sqhk.co/doboketuzoj/hgghhgQ/watch_nhl_hockey_games_online_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393901/normal_5fcc8dfe2e97e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gevewodex.epizy.com/alphabetical_order_worksheets_for_class_2.pdfIn PDF document text
    • http://wotawegij.rf.gd/95366269023.pdfIn PDF document text
    • http://vetanafajodomek.epizy.com/change_outlook_password_on_android_8._0.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_off0000e715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE715 4888 bytes
SHA-256: 3606e904c44ad0cfd2ae9a7e1b06b770aa9ef0904fea10d87b88598504d75d84
font_01_sfnt_off0000f7c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C0 11480 bytes
SHA-256: 30579a7e24780f9feca837339c6df0143a7695267380ff035e1858c86ef8e70b

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