Malicious PDF — malware analysis report

Static analysis result for SHA-256 d02a6801952702b2…

MALICIOUS

PDF

93.7 KB Created: 2021-01-12 11:39:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: dfb246c311f21d1b82f66cda79631cf0 SHA-1: 1bf93cfbe1d09a0123e9ad9de133bcd7d364b22b SHA-256: d02a6801952702b2f7c1eb5f6c3928824e31c3682fc918d8fc3232bdf104dfe6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafficel.ru/aws?utm_term=sf+cable+car+map+pdf PDF link annotation
    • https://cdn.sqhk.co/lakekomum/hbjhgcX/tic_tac_toe_online_multiplayer_code.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369305/normal_5ff89b2fdf6d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373997/normal_5fec345addb13.pdfIn PDF document text
    • https://site-1217578.mozfiles.com/files/1217578/39005670753.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415782/normal_5fa209d97fea5.pdfIn PDF document text
    • https://site-1178845.mozfiles.com/files/1178845/harley_tour_pak_backrest_template.pdfIn PDF document text
    • https://cdn.sqhk.co/relulapezele/7XhadhM/vanilla_cupcake_recipe_from_scratch_easy.pdfIn PDF document text
    • https://site-1178075.mozfiles.com/files/1178075/18619078537.pdfIn PDF document text
    • https://site-1180537.mozfiles.com/files/1180537/fopewusepizo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387817/normal_5f9e62084c62c.pdfIn PDF document text
    • https://site-1168348.mozfiles.com/files/1168348/88306614666.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459034/normal_5fade4e2e8fc0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480173/normal_5fe2b1547fb5e.pdfIn PDF document text
    • https://cdn.sqhk.co/werutojij/5KTgjjc/spanish_english_translation_voice.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/buponuwebi/blood_pressure_readings_for_women.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_off0001309c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1309C 5364 bytes
SHA-256: f55ff2df868cd88e591c57d9f195a76ce4e5fb44b9e79e0e64e82e5b793cce96
font_01_sfnt_off000142c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142C5 11460 bytes
SHA-256: e7cb211c778f61e30214a282c3a947f60cc0627eeed77ea720b2576bae4b1993