Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2a38af83386a289…

MALICIOUS

PDF

68.1 KB Created: 2021-03-01 13:21:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 9c9314e50911a15de4afa495738d6b40 SHA-1: a06986f5f19da21d26f17cd5533696ca7d9425ab SHA-256: d2a38af83386a289d294a3ee843521679f1a70324b4502a0bc4de4c85c20dec7
66 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a malicious intent to redirect users. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the presence of external URIs and the heuristic for link farming suggests the document is designed to lead users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • 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://lozipotod.ru/wix?keyword=head+volleyball+unblocked PDF link annotation
    • http://klossheff.xyz/zedenew2out6.pdfIn PDF document text
    • http://siwupojotuj.getenjoyment.net/57985916940.pdfIn PDF document text
    • http://ravigimojamel.mypressonline.com/can_you_make_money_with_algorithmic_trading.pdfIn PDF document text
    • https://cdn.sqhk.co/bisadidizi/hddidN0/tribles_inc_alexandria.pdfIn PDF document text
    • http://lakcherie.ru/98733323115x3ba3.pdfIn PDF document text
    • http://zevewidojodot.mywebcommunity.org/mta_subway_map_new_york.pdfIn PDF document text
    • https://cdn.sqhk.co/ludozenidi/hhijbhj/doot_doot_skeleton_transparent.pdfIn PDF document text
    • http://centerverifybadge.com/somopijosodinolb9dx1.pdfIn PDF document text
    • http://elinekici.online/the_armor_of_god_priscilla_shirer_free_download5uatm.pdfIn PDF document text
    • http://goodxday.xyz/29254878094jwk1v.pdfIn PDF document text
    • http://onlyforyou.space/auto_clicker_for_ipad7svmy.pdfIn PDF document text
    • http://bluebadgeapproval.com/balance_sheet_sample_ifrsgm9f8.pdfIn PDF document text
    • http://creditscorehelp.info/soylent_green_torrentxw8jy.pdfIn PDF document text
    • http://pannochki-art.com/14958500938f2441.pdfIn PDF document text
    • http://bupro.asia/315082756534b4mf.pdfIn PDF document text
    • https://cdn.sqhk.co/vifamepupib/95L5WqQ/vanilla_cake_recipe_using_condensed_milk.pdfIn PDF document text
    • http://maxist.ru/machine_liker_2020_apk_download6p6rz.pdfIn PDF document text
    • http://jovefupe.mywebcommunity.org/88412460074.pdfIn PDF document text
    • https://cdn.sqhk.co/gubisagebuto/5jdjzja/curling_3d_apk_mod_download_2019.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wavedada.epizy.com/diabetic_ketoacidosis_guidelines_american_diabetes_association.pdfIn PDF document text
    • http://lubuzozerewa.rf.gd/new_hollywood_movies_links.pdfIn PDF document text
    • http://lesadesar.rf.gd/79894668096.pdfIn PDF document text
    • http://bemugovedofoz.epizy.com/lapigujesosakosejor.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_off0000cfbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFBE 4988 bytes
SHA-256: 018a95c03be91503c571eab1d9bd5b6f4afbb10c4fa8c9c15210c578ba2fa0fd
font_01_sfnt_off0000e0d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D5 10104 bytes
SHA-256: 52ecca7831be653bb6327d032467073abc061ba4e9cda98de7a1a909e3d995d0

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