Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f62d7a3d14bdea7…

MALICIOUS

PDF

75.3 KB Created: 2021-04-18 13:09:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b772a62db06a2cfabc2cd2bc3a583bcc SHA-1: 5650bde35800e5f28cb6754b719dfda1d28ffa63 SHA-256: 8f62d7a3d14bdea714acad75e8c878508785f7727c9e2795a039c7c56e585f5c
146 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a QR-code lure. 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 0.9996

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://fokemale.ru/strik?utm_term=red+cross+first+aid+training+certification PDF link annotation
    • http://pewezeje.22web.org/goduxidaru.pdfIn PDF document text
    • http://gifudevuf.iblogger.org/babapuga.pdfIn PDF document text
    • https://xegilebul.weebly.com/uploads/1/3/4/3/134347284/savulexoju.pdfIn PDF document text
    • https://sekorora.weebly.com/uploads/1/3/4/8/134856449/panesuzokoluf.pdfIn PDF document text
    • http://xerometofu.iblogger.org/honeywell_th8110u1003_replacement.pdfIn PDF document text
    • https://xivunububan.weebly.com/uploads/1/3/0/9/130969166/witegeti.pdfIn PDF document text
    • http://bagerisevi.scienceontheweb.net/tabela_peridica_exerccios.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/df511a2d-300c-4515-b7a7-b4345b013cbc/70237183250.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/cabinet_mantri_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8588ddd-67e5-43a9-8319-0bd6c84b7f80/66187057480.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/mibuzexaj.pdfIn PDF document text
    • http://janibiledepe.rf.gd/keguparamalar.pdfIn PDF document text
    • http://relimimukavewuj.rf.gd/dereketogijigenotewanal.pdfIn PDF document text
    • http://vadowudikimaj.epizy.com/possessive_adjectives_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88dd47e2-ea67-4343-b71a-a6f078dd9111/minecraft_windows_10_free_download_full_game.pdfIn PDF document text
    • http://kedokonox.rf.gd/realidades_2_capitulo_2a_page_36_answers.pdfIn PDF document text
    • http://ruronegiseko.atwebpages.com/89708549517.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e629d6b8-05ba-41da-80b2-df2cd8085046/what_does_aisi_mean_in_steel.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/40383098947.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a453eaa9-f5c1-412b-853d-a3bd79b46f4a/is_a_simple_favor_on_netflix_or_hulu.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/49335182309.pdfIn PDF document text
    • http://dapibudajemuk.atwebpages.com/apostila_calculos_trabalhistas_2020.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE924 5164 bytes
SHA-256: 53e1fb51c734a2d035846872e88303025f462249c3a55e8279c092daaa32c539
font_01_sfnt_off0000facc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACC 10984 bytes
SHA-256: 63abcba8b8fbe6407e044254bad5cbc722a40b873f7911e1b5a3a9a20e8d7590

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