Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc32b0ad3aa2ccd3…

MALICIOUS

PDF

112.4 KB Created: 2021-06-01 18:34:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d6d8a8e74cd3b9d7e5582a853ae2cdb4 SHA-1: 51921d480d72ab22d789d69b00bd5bbee53be402 SHA-256: cc32b0ad3aa2ccd3c913a58e0459fc8896cc1284c912f7d36a3e624dc536a04c
134 Risk Score

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 an urgency-based 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 0.9996

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://oniceh.ru/pbw?utm_term=gudetama+tamagotchi+instructions+english PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377663/normal_604ba6707e916.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448121/normal_5ffd3a8eeb568.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375076/normal_5fe4940615695.pdfIn PDF document text
    • https://guvoruba.weebly.com/uploads/1/3/4/7/134742814/12553e1d76ffc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404512/normal_6003ab2aa5118.pdfIn PDF document text
    • https://gopaxabog.weebly.com/uploads/1/3/5/3/135309926/eb79961c3c7f5f5.pdfIn PDF document text
    • https://fajuvupo.weebly.com/uploads/1/3/5/3/135310445/8fc88c0.pdfIn PDF document text
    • https://kijaxezadu.weebly.com/uploads/1/3/4/5/134590125/293bbc273c9d5b.pdfIn PDF document text
    • https://memapuzubabevu.weebly.com/uploads/1/3/0/8/130813849/neganejivun-xezilopijozof.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://gosirata.pbworks.com/f/jomapi.pdfIn PDF document text
    • http://zemenifinabe.pbworks.com/f/do_covalent_bonds_form_molecules.pdfIn PDF document text
    • http://vejivab.pbworks.com/w/file/fetch/144462024/integrales_triples_en_coordenadas_cilindricas_ejercicios_resueltos.pdfIn PDF document text
    • http://xutosop.pbworks.com/f/pupobotuxe.pdfIn PDF document text
    • http://mumasenekera.pbworks.com/w/file/fetch/144423906/how_do_you_know_when_di2_is_charged.pdfIn PDF document text
    • http://savavaze.pbworks.com/w/file/fetch/144453213/exemple_plan_daction_commercial_ppt.pdfIn PDF document text
    • http://lakebimutep.pbworks.com/f/year_3_mental_addition_and_subtraction_worksheets.pdfIn PDF document text
    • http://nunaruribeg.pbworks.com/w/file/fetch/144425445/how_to_calculate_kcal_day.pdfIn PDF document text
    • http://dipoziw.pbworks.com/f/luxurasofidi.pdfIn PDF document text
    • http://vugufosenene.pbworks.com/f/20456765210.pdfIn PDF document text
    • http://funinupun.pbworks.com/f/how_do_i_register_my_boat_in_ct.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016d05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D05 5268 bytes
SHA-256: 030db353ed373c8c072f17e7e2e363884cc2cda106a3b0573f5d634258fc803d
font_01_sfnt_off00017eca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17ECA 11248 bytes
SHA-256: f595bba245779f0a76df53f3771d0eff1f4c4cf1be8addb6fabce7334a3a6af8
font_02_sfnt_off0001a52f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A52F 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c