Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbc5bcc0eaf799dd…

MALICIOUS

PDF

75.2 KB Created: 2021-03-14 17:41:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 28e125566a2285604a21114baa467193 SHA-1: 5c6962dd2b48190613b3d49f393c36bf719ba078 SHA-256: fbc5bcc0eaf799dd1e13b21e2ebf3d4707b1af405c99b775503654cfa25b6caf
126 Risk Score

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 0.9960

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://mezovuduw.ru/strik?utm_term=directions+for+the+closest+walmart PDF link annotation
    • http://gagivukamuw.getenjoyment.net/high_cholesterol_diet_food_list.pdfIn PDF document text
    • https://kunoloxudiruk.weebly.com/uploads/1/3/4/7/134767428/1df2cb02880253.pdfIn PDF document text
    • http://lozejebivo.scienceontheweb.net/28852664027.pdfIn PDF document text
    • http://tupaxeguna.scienceontheweb.net/72862191397.pdfIn PDF document text
    • https://titapogesasoja.weebly.com/uploads/1/3/1/3/131380181/1328570.pdfIn PDF document text
    • http://vavexefane.mypressonline.com/morapajakefetugetikamujit.pdfIn PDF document text
    • http://kakasusalulul.iblogger.org/dewujonijexafevafiruj.pdfIn PDF document text
    • http://xoxosedefoxadu.mygamesonline.org/kiwelafe.pdfIn PDF document text
    • https://roxasudafuj.weebly.com/uploads/1/3/0/7/130740166/6818697.pdfIn PDF document text
    • http://gepexoliv.medianewsonline.com/82107898308.pdfIn PDF document text
    • http://wejesigozolireb.getenjoyment.net/15658797095.pdfIn PDF document text
    • https://karoxenerom.weebly.com/uploads/1/3/0/7/130739074/lutozi-gugore-jifipewe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xefavab.rf.gd/99127211662.pdfIn PDF document text
    • https://2a009ac4-5770-49f2-ae16-4ce107243443.filesusr.com/ugd/59deca_41fd6ef652ec4ec5819d67fb31ad5ac3.pdf?index=trueIn PDF document text
    • https://44bb6ee8-a0fe-4f72-890f-0f0a2fec05cf.filesusr.com/ugd/b65acf_443e57cc05d840c098133205f23b9f5e.pdf?index=trueIn PDF document text
    • https://c5e26362-acc3-4c40-9db4-ce0cbd355080.filesusr.com/ugd/681527_2d97654881394d3491fd6a5baeed7083.pdf?index=trueIn PDF document text
    • https://7ae774ad-b64d-4473-a0b1-aa0db1e39e83.filesusr.com/ugd/3e7897_c0836134a1a849a1951a58ef60584a33.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7565c99-b656-4a09-80dc-fdbdf24be60d/how_many_calories_in_taco_bell_box_meal.pdfIn PDF document text
    • http://nubuwij.epizy.com/63966043591.pdfIn PDF document text
    • http://purubonosarule.rf.gd/nespresso_subscription_uk_terms_and_conditions.pdfIn PDF document text
    • http://xolavozezimodan.onlinewebshop.net/how_to_play_the_dorian_mode_on_guitar.pdfIn PDF document text
    • https://4abf464d-34d5-4c80-8de5-e64f30e04530.filesusr.com/ugd/8b3eb5_61f46c9ebb4e4e40ac52bad182102708.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9865c5c8-9cc6-4f49-b04f-bcb01435e407/blood_bowl_second_season_rules_leak.pdfIn PDF document text
    • http://kivozusemu.atwebpages.com/how_to_adjust_tension_on_bernina_730.pdfIn PDF document text
    • http://getetir.epizy.com/classification_of_drugs_in_pregnancy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6beecdae-3a88-43b4-a7d3-e5233c46e3b4/gofufasilukoviguxut.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_off0000e6a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A3 5212 bytes
SHA-256: d45222fb8a07e7fef5e65dab655a9aab013db62250344283222f01fc7271c7a4
font_01_sfnt_off0000f84c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84C 11480 bytes
SHA-256: 4ea687b2d6658756ff9bb0f61984ef9722d07eb84265c7806d075788356f205d