Malicious PDF — malware analysis report

Static analysis result for SHA-256 65a0b27191e3551d…

MALICIOUS

PDF

73.7 KB Created: 2021-03-11 12:07:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ec29b33df608d578c90621a4b5cc9c6 SHA-1: d785389a32739f8489255463c5ac26021834faf4 SHA-256: 65a0b27191e3551d046c86f5cfa88508d68f7ed0cbda43f9d3bea5ed69a643a2
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to 'audre lorde cancer journals pdf', likely to trick users into visiting the external URLs for malicious purposes. The presence of multiple external URIs and the link farm heuristic indicate a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://midufefew.ru/award?keyword=audre+lorde+cancer+journals+pdf
    • http://pojokup.getenjoyment.net/quality_management_specialist_healthcare_job_description.pdf
    • http://tuzogat.sportsontheweb.net/summer_escapes_18_ft_pool_liner.pdf
    • http://game-pro.xyz/177_mental_toughness_secrets_of_the_world_class_audiobookse7cz.pdf
    • http://sifaritube.sportsontheweb.net/59358226850.pdf
    • http://boost-store.net/zijijexigitenef3bpk.pdf
    • http://nizezoxizo.22web.org/historically_which_of_the_following_has_the_aicpa_been_most_concerned_with_providing.pdf
    • http://zesegalos.scienceontheweb.net/how_to_draw_a_catfish_fish.pdf
    • http://raisinshub.pro/what_to_do_when_needle_is_stuck_in_sewing_machineyi3g7.pdf
    • http://passive-income.ru/vonamedifofawer1c6d.pdf
    • http://maxoranano.sportsontheweb.net/gagigigesonibawivap.pdf
    • http://punavuvipufov.sportsontheweb.net/77035571023.pdf
    • http://pivojowemetobiv.mywebcommunity.org/vajadigizawafotikugerojo.pdf
    • http://zofunubesosena.mypressonline.com/gediwekoxiri.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tisudaxutuz.epizy.com/light_brown_background_images.pdf
    • http://zisuvedo.rf.gd/wiwetaniromorejolegim.pdf
    • http://zigizejifumev.rf.gd/37408870996.pdf
    • http://baxuset.rf.gd/how_to_find_initial_velocity_in_inelastic_collision.pdf
    • https://uploads.strikinglycdn.com/files/84539869-9911-4661-9dd3-bf74c4248ce4/rosematawivo.pdf
    • https://uploads.strikinglycdn.com/files/54d67597-b329-40a5-a8f0-65a375f4f78d/sudepalakame.pdf
    • https://uploads.strikinglycdn.com/files/84bd32df-9db4-4156-b44f-58f66f1c607c/gapudosetutasedafapi.pdf
    • https://uploads.strikinglycdn.com/files/0e68a61d-e1a6-4eee-b922-e43b6dd2457b/how_to_make_bookshelf_in_minecraft.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4a6.bin
5b3a40f98ef62090a7793859c1ebbb2e7256941a91bc0beb40830166e6bd4918		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A6 5212 bytes
font_01_sfnt_off0000f677.bin
2da2a10a4af3fb355557e1fd230c8843951030b5b97a8e4a55cc09edce0a9d57		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF677 10104 bytes

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