Malicious PDF — malware analysis report

Static analysis result for SHA-256 d118a5e67fba5e72…

MALICIOUS

PDF

176.0 KB Created: 2021-03-02 18:42:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 379cbf87c4aa8066ec17c194075b2fb5 SHA-1: 944d08bf2584ac6984e2eda3a4332ea5868a9cc3 SHA-256: d118a5e67fba5e7266df98cc0d5a0da24958c2a8ccc4614d4477910f5c51d66c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs pointing to disposable domains and link farms, indicating a phishing or SEO manipulation scheme. The presence of external URIs and link farm heuristics strongly suggests the PDF's primary purpose is to redirect users to malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://jottigo.ru/wix?keyword=10+point+grading+scale+plus+minus PDF link annotation
    • https://cdn.sqhk.co/devisofage/ji9QrYM/detuwasebax.pdfIn PDF document text
    • http://vegifeda.mypressonline.com/stihl_bg56c_recoil_spring_replacement.pdfIn PDF document text
    • https://cdn.sqhk.co/tixelila/BEvheD0/mijoxomuluzek.pdfIn PDF document text
    • https://cdn.sqhk.co/xenojepezere/gdNb2QS/pisebabajebebufaridimexez.pdfIn PDF document text
    • https://cdn.sqhk.co/vefutifeves/ji3Fiid/ruwujevobap.pdfIn PDF document text
    • https://cdn.sqhk.co/tisufupujeli/hbhjjfH/nanusisoxuvejexo.pdfIn PDF document text
    • http://bhd-management.space/rosisarezoxefofavovuzehjkn.pdfIn PDF document text
    • https://bavodujamula.weebly.com/uploads/1/3/4/8/134855902/5483426.pdfIn PDF document text
    • https://kukevukoleguko.weebly.com/uploads/1/3/4/2/134265740/9586988.pdfIn PDF document text
    • https://cdn.sqhk.co/bipozipo/enpR75u/metal_boy_dog_names_that_start_with_b.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/H2Tjfqn/electric_poffertjes_dutch_pancake_maker.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lexamokoxerum.atwebpages.com/mq_reason_code_2538_mqje001.pdfIn PDF document text
    • http://roveramo.atwebpages.com/ruxemonotidul.pdfIn PDF document text
    • http://viwuwijagabote.myartsonline.com/8484566585.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off00028f98.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x28F98 20444 bytes
SHA-256: e89b8dfb9186b9ac1d062ba7aa83a1d0f3934fcd1ac4acb2bd0e8af3b6072632
font_00_sfnt_off000235b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x235B6 3096 bytes
SHA-256: 2693cdecf5147b672130250c403c4ccd23732dd3fa421ce57934a96a676cb997
font_01_sfnt_off000240d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x240D9 5492 bytes
SHA-256: 8e1255a913cf5535aa06e7603dc428d117c6d08970f5559e72dad05f89beebdc
font_02_sfnt_off00025376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25376 19456 bytes
SHA-256: 08a0567f10add212f5cdfcce5440e1f4525bae90939f50c8226b0732a100fb07

Open this report in the interactive analyzer, or submit your own file for analysis.