Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc791e65c014e110…

MALICIOUS

PDF

84.2 KB Created: 2020-11-19 04:08:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 2e730962a63ee8b28ad1615e66c44c6e SHA-1: 21951dd5de1e7d4ed84c86dac3e1a2fa209a5f34 SHA-256: fc791e65c014e11047313c89b33fa8421fc83aadd4621a397e0dd0b2527c31c4
254 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and SEO link farming, pointing to a phishing or malware distribution scheme. The primary malicious URL identified is 'https://traffine.ru/strik?utm_term=sony+a100+camera+manual', which is linked to known malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffine.ru/strik?utm_term=sony+a100+camera+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403121/normal_5f973e2dde23f.pdfIn PDF document text
    • https://gowubezu.weebly.com/uploads/1/3/4/4/134497845/a5107cab5d12f.pdfIn PDF document text
    • https://gefeteki.weebly.com/uploads/1/3/4/3/134310298/lomuvonirewomitevata.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/fejififimaketo/zuzakenelaniter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fd151f3-81e0-4cb6-9e72-768656b26db5/classical_and_statistical_thermodyna.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/jurnal_morfologi_cestoda.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/26848471737.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b860f37-492e-484e-8d7f-30113dec6746/joindre_fichier_messenger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/849dc501-8f23-42e4-b1ec-721bc7099a02/7971832100.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83762351-e5fa-4652-bcfc-18b7bfe482ae/93055094990.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96eb6bd7-448e-4216-81f9-39a3d527b490/santa_claus_is_comin_to_town_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/brain_power_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdc8b547-0d93-4f0c-9040-8bee95ea6ace/xikoseforosuviwiluk.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/cedar_picnic_table_sealer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc04b60a-bc2e-427a-afb2-77479df88a4a/play_hacked_snake.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FA 4920 bytes
SHA-256: 890c2295d71a3db6e99ad00fd0ca12621af8407fc32dcd36edaa8d3764422f34
font_01_sfnt_off00011192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11192 10576 bytes
SHA-256: 236622e5100142dc294e905da780c1dfc5077355c2c3de12a27385334b3fc897
font_02_sfnt_off000135b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135B6 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71