Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5344a8182a8e87d…

MALICIOUS

PDF

62.2 KB Created: 2020-12-03 11:50:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d3454f3779a529755695b536e77d909 SHA-1: 7dfe4744c338f2e053005e36d457f4baeeade457 SHA-256: c5344a8182a8e87d2fd86f2969e166dc74140eb038c18e81991d76dedbfd37de
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, containing numerous external links, many hosted on disposable domains, designed to redirect users to other sites. The presence of URLs like 'https://traffking.ru/strik?utm_term=comady+new+2020+tamil' suggests a phishing or scamming lure, potentially for SEO manipulation or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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-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://traffking.ru/strik?utm_term=comady+new+2020+tamil
    • https://jomigotub.weebly.com/uploads/1/3/4/7/134748998/nipokogegoti.pdf
    • https://jugidemavewug.weebly.com/uploads/1/3/4/2/134265355/3b65cbf.pdf
    • https://sisebixa.weebly.com/uploads/1/3/4/6/134625325/duvixumusezed_gupugilumorugag_bifugilafomusag_nudaweto.pdf
    • https://tatunonomufobuf.weebly.com/uploads/1/3/4/3/134355176/80b8612d517a82.pdf
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/buwafemojuzota.pdf
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/vutaduge-kerobubojibi-gilapa-kotini.pdf
    • https://gurigibafex.weebly.com/uploads/1/3/0/7/130739571/88b40badd.pdf
    • https://loxazofobel.weebly.com/uploads/1/3/4/2/134265844/4129380.pdf
    • https://bupigesow.weebly.com/uploads/1/3/4/3/134360728/wuxizivezusaka.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5bed7acac6192ab83d70/1606376439599/super_mario_64_no_music_code.pdf
    • https://uploads.strikinglycdn.com/files/2e34f08c-1049-4ebc-82b2-dd7382141484/hearts_of_christmas_cast.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe1ec89ee0f32b871c814e/1606295240959/unblocked_games_gun_mayhem_2_weebly.pdf
    • https://static1.squarespace.com/static/5fbfe895e5c7695ca99606f9/t/5fc0f93f3f75b16643f6ded0/1606482240578/pokemon_tcg_standard_rotation_2020.pdf
    • https://uploads.strikinglycdn.com/files/5b27dc84-539e-4b8a-baae-010237fea26b/18934536176.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000abd8.bin
50654629c258fb2f511451d53a840e85d73707b1b1f87aadad27b1724b34e4dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABD8 5068 bytes
font_01_sfnt_off0000bd12.bin
d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD12 3720 bytes
font_02_sfnt_off0000c875.bin
222b9b1a407f2e8ce6a6e34176932420a78457c6de384f5180841cbe9e5c6e7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC875 9884 bytes

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