Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7d70d2d46c46052…

MALICIOUS

PDF

81.7 KB Created: 2021-03-24 17:46:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 6fa8f325909504ec7cfa0335907ee4d7 SHA-1: 22ae8f6b1c8dee5f02c13fc53d6b0d3ce9ca2d12 SHA-256: a7d70d2d46c460529f9d2f9ab593bfd5d1f61f813eb7dea49bac47b1f1eb8089
134 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of numerous external URIs, including one with UTM parameters suggesting a tracking or redirection scheme, points towards a phishing or malware distribution attempt. The heuristic 'SE_DOWNLOAD_BUTTON' further supports the idea that the document is designed to trick users into clicking a link to download something potentially harmful.

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?utm_term=hp+designjet+500+mono+24+driver+windows+7+64+bit PDF link annotation
    • https://jarowezib.weebly.com/uploads/1/3/0/8/130813985/ganorowukuwi-juberovinur-fukojagima.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427821/normal_5fd80de53231d.pdfIn PDF document text
    • https://milonotupilo.weebly.com/uploads/1/3/5/3/135347339/degemevajibolu_deserubawokiz_zosix_venigi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482228/normal_5fd6cb506701a.pdfIn PDF document text
    • https://cdn.sqhk.co/famuxina/sibihic/wood_shop_dust_collection_ideas.pdfIn PDF document text
    • http://fatimuze.22web.org/16833938629.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449788/normal_6038c1bd929c1.pdfIn PDF document text
    • https://gonufefimexej.weebly.com/uploads/1/3/4/8/134892828/disixibuwipitam-butejopupodu.pdfIn PDF document text
    • https://nijupafubowawiz.weebly.com/uploads/1/3/4/0/134012726/zotato-kosukajapalokej-gibavaju-felivomeruza.pdfIn PDF document text
    • https://kuruxeronujupo.weebly.com/uploads/1/3/4/4/134477992/066306dc0c80b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368506/normal_5fe8cab7c353a.pdfIn PDF document text
    • https://cdn.sqhk.co/javomekoru/behfgND/16881500124.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459624/normal_603e70f0260aa.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/pulujolatepuv/92404038467.pdfIn PDF document text
    • http://mowixir.epizy.com/45203788795.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/76764569083.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66bff87f-8660-46b8-b5c6-e29ea568500a/2007_toyota_camry_hybrid_battery_replacement_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82b75c3d-8fa4-46e2-90d2-fe83b67aa2d3/jevugawijafixosa.pdfIn PDF document text
    • http://zelulujo.epizy.com/95432353837.pdfIn PDF document text
    • http://ritanuwo.epizy.com/28885175325.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f6d20dc-cb60-4b36-b8c1-ba645597ec66/what_size_battery_does_a_g-shock_watch_take.pdfIn PDF document text
    • http://gesonumakokobal.rf.gd/febrile_seizure_guidelines_2018.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eacc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACC 6088 bytes
SHA-256: 619a3e9884158c1da50f83ca85f1506a339edb45d05f0d4111882be8aebcf7f2
font_01_sfnt_off0000ff93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF93 10612 bytes
SHA-256: ec694e665f76d0d255679697d89474f7e3b194513d9dd8522f94837af832226f
font_02_sfnt_off00012423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12423 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7