Malicious PDF — malware analysis report

Static analysis result for SHA-256 d929753540b4182d…

MALICIOUS

PDF

83.7 KB Created: 2021-03-03 17:40:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2417895b6bf50d2771d52d32866640e6 SHA-1: 4f99acfa729b4ff988b09894380d15e1c9b23b91 SHA-256: d929753540b4182d82ba82823596a1b87c4c98f0708e36345fe6a43375838d32
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of numerous URLs and the nature of the heuristics point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=what+are+good+books+for+tweens PDF link annotation
    • https://kololeranazi.weebly.com/uploads/1/3/4/5/134583506/7076299.pdfIn PDF document text
    • http://skout.tech/new_latest_ringtone_punjabi_2019_downloadm2mi8.pdfIn PDF document text
    • https://ripaduwik.weebly.com/uploads/1/3/5/3/135311581/bugitapofajasanevoda.pdfIn PDF document text
    • http://worldthailand.fun/compaq_presario_v5000_specsv327e.pdfIn PDF document text
    • https://jamelowo.weebly.com/uploads/1/3/1/6/131606155/7911253.pdfIn PDF document text
    • https://cdn.sqhk.co/fegadosijete/zJcjghe/photo_collage_frames_software_free_download_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/tevosenijosu/6dmgipC/3d_racing_games_for_pc_download.pdfIn PDF document text
    • http://losinglotterynumbers.com/dodokgpik6.pdfIn PDF document text
    • http://hrushch.space/shell_script_basic_exampleshcx4l.pdfIn PDF document text
    • https://jekufagiz.weebly.com/uploads/1/3/0/7/130739150/7196564.pdfIn PDF document text
    • https://topudamix.weebly.com/uploads/1/3/4/5/134581811/5974563.pdfIn PDF document text
    • https://cdn.sqhk.co/zidodovare/g1heNsa/fake_gps_location_iphone_without_jailbreak_ios_13.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopaji/g8jhbij/gevesubareb.pdfIn PDF document text
    • http://petrol-v-pol-price.site/ford_focus_2003tb9m5.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
    • https://s3.amazonaws.com/remavuj/job_application_letter_in_modified_block_format.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/how_to_replace_ink_cartridge_hp_envy_5055.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/vovepipuvuponimujobig.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/55218181622.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/dekaxupikekunoxe.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/figeseretomuvi.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/29756634415.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/belhaven_beach_surf_report.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF08 5184 bytes
SHA-256: ed42cccfe9dd4dfddfe92bf66eee64cb719f027b3576edcd90cf564635c2cb11
font_01_sfnt_off000110b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110B6 10104 bytes
SHA-256: bef53e45e22a61081f78efb162ec00917b00cbe525349cfbd6f868bcd70ac571
font_02_sfnt_off0001334d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1334D 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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