Malicious PDF — malware analysis report

Static analysis result for SHA-256 969a4fa262b21601…

MALICIOUS

PDF

66.4 KB Created: 2020-12-31 20:49:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9021f1b2cab97d5d8366410c3c913707 SHA-1: e1ca1d5df7182caa1c9c0bedf73f8c2e3579c5f9 SHA-256: 969a4fa262b2160161ed31a8909da7ac3bf95d6d44865be275bc07b60d7b594d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many of which are benign, but one points to a suspicious URL that appears to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the PDF structure itself is used to host a mass of external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://trafftec.ru/strik?utm_term=inside+out+song+lyrics+eve+6 PDF link annotation
    • https://pigunakates.weebly.com/uploads/1/3/4/6/134628742/523c36b8cdfa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385228/normal_5fd36be88fa6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390366/normal_5f95de2158a84.pdfIn PDF document text
    • https://cdn.sqhk.co/wezopexa/yjjfAia/dexot.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/6069273.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/salosibejodod/websites_for_anime_english_dub.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/89724006981.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a21e9fdc-e764-48bd-8509-4124b3db88f5/runts_candy_logo.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/74131577877.pdfIn PDF document text
    • https://s3.amazonaws.com/petubapizo/ost_curse_of_the_golden_flower.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/grapes_of_wrath_quotes_about_poverty.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfa7ee59-ee9b-4ac7-a4e0-f551e4332b74/grand_theft_auto_5_cheats_ps4_phone_numbers.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/all_bollywood_songs_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/aspire_modules_tcs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bafe20e-6b5a-4642-a5db-bb4905cbe82b/ge_oven_326b1230p001_manual.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC651 5148 bytes
SHA-256: 47136383b8b73c255b5bf39ac6e899c3f6fa036ce40f5f1f674e6be980b07f8b
font_01_sfnt_off0000d7f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F9 10908 bytes
SHA-256: d45efcc92b80ef47778550bdc481db513e80e82325290137cee97ccc7d6fd3a9

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