Malicious PDF — malware analysis report

Static analysis result for SHA-256 16ccfeef744f3c05…

MALICIOUS

PDF

103.7 KB Created: 2021-03-18 17:43:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0a40201042e40b2c8159460a0ebcaa47 SHA-1: ca76727e1cadbc6f78779eb44fb2bce6d2e6df73 SHA-256: 16ccfeef744f3c055b86c567a5edadfdd4087ba790c0d3a98ca91c3fc4a5e699
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 0.9995

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://kuzutuzo.ru/123?utm_term=generative+adversarial+networks+projects+kailash+ahirwar+pdf PDF link annotation
    • http://jaxebememapi.iblogger.org/balaklava_cup_form_guide.pdfIn PDF document text
    • http://nuxefigemotak.22web.org/alpabetong_filipino_worksheet_grade_2.pdfIn PDF document text
    • http://davegopodowog.iblogger.org/nugabutinatedekole.pdfIn PDF document text
    • http://xufamorazogubov.sportsontheweb.net/24812047615.pdfIn PDF document text
    • http://wudenufodoroziv.scienceontheweb.net/34918566156.pdfIn PDF document text
    • http://gifebadop.iblogger.org/36016190746.pdfIn PDF document text
    • http://pugisapi.mypressonline.com/rulepopuwiropiwali.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rowomasogig.epizy.com/investigation_report_sample_template.pdfIn PDF document text
    • http://pudunajuge.rf.gd/callablestatement_jdbctemplate_example.pdfIn PDF document text
    • http://kesopepi.rf.gd/fotamejidixij.pdfIn PDF document text
    • http://revulagolorer.epizy.com/47405185800.pdfIn PDF document text
    • http://vebagakid.onlinewebshop.net/valazejototeralene.pdfIn PDF document text
    • https://d4508431-0eee-4913-ac2a-2ec907ed9b18.filesusr.com/ugd/12daa7_62a4e5754a584ab384e1201314506d40.pdf?index=trueIn PDF document text
    • https://6e7ef639-f89a-4701-86f9-710a836f1183.filesusr.com/ugd/12745a_b06ddf71682341d18ee562a4393a010d.pdf?index=trueIn PDF document text
    • http://susegutej.epizy.com/58601369414.pdfIn PDF document text
    • https://89d9876f-4e47-4433-ab5b-8da47ae3ae5c.filesusr.com/ugd/37c326_b52a24a369c6417fa949ca0c86467eee.pdf?index=trueIn PDF document text
    • https://03dfb0eb-7fe6-4188-ad87-ea2b88df7b19.filesusr.com/ugd/f967ac_8b074ac4e7f5491a89647d89dfa95576.pdf?index=trueIn PDF document text
    • http://naxefebubelaj.rf.gd/forklift_training_schools_in_nj.pdfIn PDF document text
    • http://zawuruwune.epizy.com/mathematics_for_economists_questions_and_answers.pdfIn PDF document text
    • http://kexofiz.epizy.com/jupupifikojejidofazigo.pdfIn PDF document text
    • https://a29d81ee-e589-4368-99bd-4e0be04eb4c0.filesusr.com/ugd/a89e6e_fbdca09fe5f44e81b1c60e081117e3a6.pdf?index=trueIn PDF document text
    • http://sumojoripira.rf.gd/lofebixukilen.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_off00014117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14117 5564 bytes
SHA-256: 8fff7fe4385e9e08aefa2209c5214fa0a11a26eaadf201c32d5138b71ce9501b
font_01_sfnt_off0001541d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1541D 11736 bytes
SHA-256: 50c4aa752549be5108a7a46c0a56637b8526d884dfc2e6fe916ba7b23e46d5ea
font_02_sfnt_off00017b7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B7A 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15

Open this report in the interactive analyzer, or submit your own file for analysis.