Malicious PDF — malware analysis report

Static analysis result for SHA-256 68d5206b0cabcc70…

MALICIOUS

PDF

77.9 KB Created: 2021-03-16 19:59:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa90d98867e271a8476fc57fb5375c8a SHA-1: 15ac7ec8a7aeab5e6167cd257ae5f7f420b793ea SHA-256: 68d5206b0cabcc704c1b9f308ed8ce060b8d8d27456469b5c259433d46500e3b
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to facilitate the download or redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/strik?utm_term=nationalism+in+india+important+questions+and+answers
    • https://cdn.sqhk.co/gewewoturila/difgcjf/demazer.pdf
    • https://cdn.sqhk.co/furigelo/hLhjAic/farm_bay_enterprise.pdf
    • http://disclosures.space/tudiripekimovewevojilozmi30.pdf
    • https://cdn.sqhk.co/mezutorixo/jhniaCj/live_wallpaper_hd_background_mod_apk.pdf
    • http://rivalo130.com/vuwasesakaruwinorafv2lz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7faed3fc-99ff-4037-9b9d-869804da9a81/what_are_the_scales_of_measurement_in_research.pdf
    • https://uploads.strikinglycdn.com/files/73834e0d-315e-4974-b24d-e4c2afd70ae8/14354311737.pdf
    • https://s3.amazonaws.com/jenagubadopi/bmw_e39_530d_auto_to_manual_conversion.pdf
    • https://s3.amazonaws.com/wunupalezozerud/chamma_chamma_song_mr_jatt.pdf
    • https://fdb4f28e-c637-431f-967d-457feef73efb.filesusr.com/ugd/cf5aa9_651354110ace4c35995f5042d5b927d7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/804d5b75-f977-4803-82a6-b471c20d2d48/rumalifozupidowutu.pdf
    • https://s3.amazonaws.com/rizezobabub/black_s_law_dictionary_11th_edition_free.pdf
    • https://7a9095e9-4ba3-4ff7-9406-a75d0382ce8a.filesusr.com/ugd/db93e9_1dd7f2c4803747c592ab93a932b9815a.pdf?index=true
    • https://s3.amazonaws.com/lezopobigeza/54427700711.pdf
    • https://6c473ef0-402e-45f0-9f95-6bc7e89a6a1a.filesusr.com/ugd/5518c3_bd6430b649cf4e7985ada5d1d43a8d0e.pdf?index=true
    • https://f39f7cea-6337-46de-af4f-699959e6db0a.filesusr.com/ugd/004672_ca9fdbd6349c449cadb8a5a9a6d63a0e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/77907768-bbdf-4d0a-bbe7-f3e7709033c0/ribeso.pdf
    • https://s3.amazonaws.com/sogovekevi/whats_a_storyboard_artist.pdf
    • https://40e214c1-1950-44e8-a195-e2c6eeb23253.filesusr.com/ugd/a517f4_48979beb2d3b4e23b978fadfa2aa1b95.pdf?index=true
    • https://s3.amazonaws.com/kudowo/jepurotutapubutekamidupu.pdf
    • https://s3.amazonaws.com/dutimajizowa/barbados_passport_application_form.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef22.bin
4ff1e2092b20137f76d629369449c43f5e682757522ab6dff4fa8d1f3881c1b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF22 5292 bytes
font_01_sfnt_off00010118.bin
e8f09e6cea7ad6c0f9668061084d774aeff701289557409f28412e6f4a0f4b8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10118 11584 bytes

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