Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3ba68a47affc4b3…

MALICIOUS

PDF

92.5 KB Created: 2021-06-04 09:40:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 14138fd775007444d32417688b2ff630 SHA-1: 898aeb40857197504dc9d4753cd0d33d6f1c46fd SHA-256: d3ba68a47affc4b33496d580c271a0ce6e2d08786c573b591cce99c7a693f7e2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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 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://resalured.ru/123?utm_term=ada+diabetes+guidelines+2019 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454678/normal_5ff2259ed400e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427795/normal_602888d51ca54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408180/normal_6061a2e09b6e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383795/normal_60442fb04b784.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409244/normal_5ff855ae306b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492281/normal_5ff7cacbd4b2f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426972/normal_5fc67b6671a78.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
    • http://lulimogosan.pbworks.com/f/what_do_car_dashboard_warning_lights_mean.pdfIn PDF document text
    • http://liwuvedesisu.pbworks.com/f/how_to_find_diameter_of_a_circle_when_given_circumference.pdfIn PDF document text
    • http://bilabegape.pbworks.com/w/file/fetch/144480267/chhota_bheem_and_krishna_kirmada_full_movie_cartoon.pdfIn PDF document text
    • http://xalomuzavege.pbworks.com/f/zevujexanituketizepexop.pdfIn PDF document text
    • http://wiwudoje.pbworks.com/f/best_marketing_campaigns_2019_canada.pdfIn PDF document text
    • http://degenazi.pbworks.com/w/file/fetch/144456813/electronics_principles_and_applications.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61485fc7-9457-4546-8f7c-7775887c6871/neverending_story_flying_dragon_dog.pdfIn PDF document text
    • http://lopofemusun.pbworks.com/f/59867912763.pdfIn PDF document text
    • http://xalomuzavege.pbworks.com/w/file/fetch/144459615/firamafinunipuradopif.pdfIn PDF document text
    • http://tereburokofe.pbworks.com/f/soral.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15580c00-88bf-48d9-990e-66445f0b4ae0/honda_gcv160_air_filter_cover.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_off0001204d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1204D 5280 bytes
SHA-256: 644c64544fe5bdcedb783b55ed4bb29ce7f2ec258f90185335d51c777bc9c183
font_01_sfnt_off0001324a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1324A 10792 bytes
SHA-256: 5feccecde6c08fed6c4df4750e77420b8d56ade72243f6e1007d6ebdda7cf454
font_02_sfnt_off00015700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15700 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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