Malicious PDF — malware analysis report

Static analysis result for SHA-256 dec0370395795c2b…

MALICIOUS

PDF

69.7 KB Created: 2020-12-29 13:45:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5ab7c1d19b008cc37150cfa1e4cdd4f5 SHA-1: 913a3236ff82d82d18678d3f9226b5c63b31d1c3 SHA-256: dec0370395795c2ba20db178d326e48887c443c0c60b7f4128403c739f6196fc
244 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, containing numerous embedded URLs pointing to external resources, some of which are flagged as malicious redirectors. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or SEO manipulation. No scripts were extracted, but the presence of multiple suspicious URLs suggests a redirection or download attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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.
  • 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://gettraff.ru/strik?utm_term=cafe+racer+unlimited+money In PDF document text
    • https://motoburibekisi.weebly.com/uploads/1/3/4/6/134623685/zekiko-zugitaru-degipadubame-xotelafifaz.pdfIn PDF document text
    • https://cdn.sqhk.co/fevivesuxofo/jc8hjTk/carnival_hub_app_not_compatible_with_device.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/hgfcOhd/merchant_services_phone_number.pdfIn PDF document text
    • https://xubuvene.weebly.com/uploads/1/3/1/3/131380433/dolonawunesi.pdfIn PDF document text
    • https://nukubutoti.weebly.com/uploads/1/3/2/3/132302768/sejewemivo_jusubebovoweda_xevotadarodebo.pdfIn PDF document text
    • https://mepanomelisegil.weebly.com/uploads/1/3/4/8/134899905/gudosutajowiluke.pdfIn PDF document text
    • https://ripumoravoramex.weebly.com/uploads/1/3/1/6/131606135/6278.pdfIn PDF document text
    • https://pigamudabuv.weebly.com/uploads/1/3/4/2/134235231/zogome.pdfIn PDF document text
    • https://zagukosi.weebly.com/uploads/1/3/4/3/134314994/rajem.pdfIn PDF document text
    • https://wikoriduban.weebly.com/uploads/1/3/4/3/134341401/382264.pdfIn PDF document text
    • https://dafepigog.weebly.com/uploads/1/3/4/6/134605944/5924956.pdfIn PDF document text
    • https://xazunavawotop.weebly.com/uploads/1/3/4/7/134724639/5750398.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/xojafemori/zesekomuwaraf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae9a00e3-0d49-4e75-af2a-4360376f7da3/fijomusoboruwavusud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/816c62e4-ac66-4c01-a566-1cdd5afc7a68/doom_ii_rpg_android_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57002921-6847-46ef-b5db-ecc9583fb9b7/50060640906.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/nc_eog_practice_reading_test_for_4th_grade.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_off0000d3b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B3 4996 bytes
SHA-256: e5f32c19f9bfda0dc2e32239e5ac0602b336e94743c1c9976177799c4f6c1d5d
font_01_sfnt_off0000e4a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A5 10856 bytes
SHA-256: e7651fb17e5b3b6c2fbb53873688ee746d9539f6c5077380f289c26c5462a1ec