Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0c145d645346aa2…

MALICIOUS

PDF

86.4 KB Created: 2021-04-25 03:14:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4388b525e7779ea3ec90fb9e39c543da SHA-1: 767b33419ee91e2c33eaa25a7435e51e363bdc4d SHA-256: c0c145d645346aa26828d078682c0cfe6dfeb1d8d13d23a6a8ad5036cd8cbbbf
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9995

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://ponafet.ru/strik?utm_term=keurig+2.0+carafe+instructions PDF link annotation
    • http://xalesawena.iblogger.org/does_vicks_warm_mist_humidifier_need_filter.pdfIn PDF document text
    • http://mujudesuxiropa.sportsontheweb.net/94879720656.pdfIn PDF document text
    • http://viniveba.mywebcommunity.org/graco_modes_jogger_se_stroller_reviews.pdfIn PDF document text
    • http://simodotufaz.iblogger.org/how_to_find_prevailing_wage_jobs.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/c6026cda-17d7-4c68-b00d-d6bf1914796d/is_30_mbps_good_for_ps4.pdfIn PDF document text
    • http://rajuxibusajebob.rf.gd/14014465068.pdfIn PDF document text
    • http://vibodox.rf.gd/7933143337.pdfIn PDF document text
    • http://ninanupazazudad.rf.gd/ahuja_microeconomics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2033abca-1347-4517-8310-27f099ff3773/mewivukewoparazoxuw.pdfIn PDF document text
    • http://dolowebufawazir.epizy.com/miwobujiresulavix.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/64434107553.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af200f5c-765f-4ce3-8f37-d440a2b2e8f1/sahih_bukhari_roman_urdu.pdfIn PDF document text
    • http://gubawakelu.onlinewebshop.net/attorneys_act.pdfIn PDF document text
    • http://fivamoxopel.epizy.com/zapizezej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4351ec8-bacb-48b3-8d9d-8aa52e4bcb4a/vegalotevemogugube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/050c7f6b-ad6e-4a1b-8db7-c1dbdf7e69bf/proform_545s_treadmill_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a783b5b6-1b37-4f5d-ba11-a74f0acfa5db/bubolowelawavawifosepug.pdfIn PDF document text
    • http://sukowinom.rf.gd/55931317878.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/78153494555.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0295fe01-dcc9-42aa-a83a-6b129c40f9d9/voliganod.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/mezorumiwenimuf.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/what_is_the_purpose_of_law_in_todays_society.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE12 5292 bytes
SHA-256: f67802b6461f93ab10dc32524bd9f71c8e67adf2b4fb9b904a34d9516e9cceb8
font_01_sfnt_off00011034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11034 11488 bytes
SHA-256: a7fd3460fa29484f4a0f0bb091ce7cc6e39ed2cf374df24689a84277fc0d7826
font_02_sfnt_off0001370d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1370D 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

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