Malicious PDF — malware analysis report

Static analysis result for SHA-256 c47fc2ffa28360b7…

MALICIOUS

PDF

81.9 KB Created: 2021-03-30 09:55:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80747e0ae389f39103e387e922cac7e4 SHA-1: 65be5471a545c769da85fa648305918a3f55d635 SHA-256: c47fc2ffa28360b79cab13bcf4d232f7f6d0b9fcb38811da91aea43b67183ea2
156 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a phishing or SEO spam campaign, indicated by the presence of numerous external links, one of which is a suspicious URL. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to harmful content or exploit vulnerabilities. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with techniques used to distribute malware or facilitate phishing.

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://xezojetit.ru/strik?utm_term=army+pistol+qualification+pop+up+targets
    • https://cdn.sqhk.co/ganuniwiku/ihCOdah/hexaware_technologies_chennai_address.pdf
    • https://cdn.sqhk.co/gabunufu/jglaLhb/subway_surfers_characters_frank.pdf
    • https://cdn-cms.f-static.net/uploads/4387825/normal_5fe805dc50220.pdf
    • https://cdn.sqhk.co/jasurisunav/8gcZEgf/photography_studio_backdrop_roller.pdf
    • https://static.s123-cdn-static.com/uploads/4490930/normal_5ffdc2d805b8e.pdf
    • https://cdn.sqhk.co/woxekivepi/Hjeihjf/best_programmer_for_2016_6._7_cummins.pdf
    • https://static.s123-cdn-static.com/uploads/4418963/normal_5ff05f689adb0.pdf
    • https://cdn-cms.f-static.net/uploads/4449627/normal_600bc4c206a39.pdf
    • https://cdn.sqhk.co/gagufatemo/OribgeQ/soccer_world_cup_trophy_worth.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://72cee60b-533f-4fda-9f40-87b1bb6f0553.filesusr.com/ugd/590778_8dd51f1f658d4ec2a3ef75177faa2559.pdf?index=true
    • https://4adff18d-dc39-4349-be2c-eeb12737f1cb.filesusr.com/ugd/9117e0_97300e5deffa4948a72640f784998c96.pdf?index=true
    • https://37bcb4aa-7747-4ff6-a352-0e22bf983c21.filesusr.com/ugd/4393d3_cca19ae08d6743508b5c95b3f1e40359.pdf?index=true
    • https://5a060084-92f5-4e09-b02e-bbac8bb45871.filesusr.com/ugd/05c943_079e57f8f6dc49788978bf1b92f2c8d2.pdf?index=true
    • https://b19b3b79-9ae2-4e99-9b16-ef32671d60f4.filesusr.com/ugd/0bc867_630bfcdef74948fb9cc098e0357c9c81.pdf?index=true
    • https://uploads.strikinglycdn.com/files/fcf6d564-5abe-4e01-9ab5-847fb9b1bd24/what_does_the_nursery_symbolize_in_the_veldt.pdf
    • https://0a497e50-07dd-462d-832d-d8678f741a8e.filesusr.com/ugd/5f857b_ee23b6052852415a97f6dc37dccbe698.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b51ff2b8-27d7-4066-8e8a-30667a2f1484/51690716490.pdf
    • https://uploads.strikinglycdn.com/files/271df24a-15c4-4973-9218-b04a329cbd9c/6642494848.pdf
    • https://1864c106-1a4f-4194-99fb-dabd5a0af450.filesusr.com/ugd/17b194_386d537569fb4169930cca8cbda04472.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0ce0e7e3-e460-43fa-acee-b738691177c5/94307755100.pdf
    • https://2a04f01a-7147-4793-98aa-b59dc93e6f96.filesusr.com/ugd/efcdeb_88d6c6579337452f944a27ebaace0d50.pdf?index=true
    • 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_off0001032f.bin
eaeb8ca65b5253c7836d7a3ada26372042204851062b5c30b85beb38d02dc987		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1032F 5552 bytes
font_01_sfnt_off00011602.bin
5f38f49780fd91a8cf4ec5ec48bd4c0b62ca5e4508a557d0ab1972d96f7fa64a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11602 10660 bytes

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