Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f0931b62dc5f39d…

MALICIOUS

PDF

70.9 KB Created: 2021-01-29 19:22:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 63cfde06da194889512ff65b82ec8945 SHA-1: e9e213c9c47131dfbdcb9d28197482d1f95bddb1 SHA-256: 7f0931b62dc5f39de6485dc59af174fe7007a6f7da09c63bf18897dfe070b78d
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are associated with link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

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://jottigo.ru/aws?utm_term=cincinnati+bengals+schedule+pdf PDF link annotation
    • http://tehnikator.ru/940587355731pa8g.pdfIn PDF document text
    • http://fakaripeti.xyz/2020_football_schedule_south_carolinatxxiq.pdfIn PDF document text
    • http://edalovert.xyz/81498695022embst.pdfIn PDF document text
    • http://nukicew.xyz/war_chest_board_game_strategyj11wm.pdfIn PDF document text
    • https://gexuguxibam.weebly.com/uploads/1/3/2/6/132696321/semiri.pdfIn PDF document text
    • http://papopeputato.iblogger.org/87008721419.pdfIn PDF document text
    • http://hookup158.fun/gulusiwawudafikidolejijrsfa.pdfIn PDF document text
    • https://lonunirixug.weebly.com/uploads/1/3/2/7/132710494/d55012.pdfIn PDF document text
    • http://leree4.club/unblocked_games_76_drift_car_simulatoryjjcz.pdfIn PDF document text
    • http://wbigs.space/nibefakujepakapokabizostkxwj.pdfIn PDF document text
    • https://lefatelaxebaj.weebly.com/uploads/1/3/5/3/135398996/7565889.pdfIn PDF document text
    • http://vvvvvvvvvvvvvvvvvvvvvb.xyz/bisafopulavazapovokpshk.pdfIn PDF document text
    • https://sugelama.weebly.com/uploads/1/3/4/8/134898925/3e8872da.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/vuxagixil/83520817568.pdfIn PDF document text
    • http://temomuduzuba.epizy.com/asus_fx504g_driver.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/36390180283.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/biriyani_movie_video_songs_isaimini.pdfIn PDF document text
    • http://mapegolirij.epizy.com/32649986055.pdfIn PDF document text
    • http://lamekukibudinos.epizy.com/3_weaknesses_job_interview_examples_answers.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_off0000d6dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DC 5364 bytes
SHA-256: 0b45315eb5326e39d12634ac00389d49bb1cee3e5e57162ee7a4e58997a7e31e
font_01_sfnt_off0000e912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE912 11020 bytes
SHA-256: a70fc0cdd83b9be3bb50aca31d938b922c35237974b89eb3f15503a33003e24c

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