Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c23f765b3f6c1e8…

MALICIOUS

PDF

69.8 KB Created: 2021-03-31 13:30:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: aa7d98375c3fd2c0039356b9895b1830 SHA-1: 9a6cf980777486cff9ebd0470fa090e558ddb436 SHA-256: 1c23f765b3f6c1e8e03c230151ef630a9dc92935738105c8bab61a6ac163e076
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm designed to host a large number of PDF files. One of the primary URLs, 'https://bologen.ru/123?utm_term=afbeeldingen+samenvoegen+naar+pdf', suggests a lure related to image-to-PDF conversion, likely a phishing or scam tactic. ClamAV detection as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' further supports its malicious nature, indicating a phishing or trojan payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/123?utm_term=afbeeldingen+samenvoegen+naar+pdf PDF link annotation
    • http://kokulotasuz.mygamesonline.org/bijuni.pdfIn PDF document text
    • https://cdn.sqhk.co/kogoruzojif/gfRpjiX/game_of_thrones_swords_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/bidekidarub/L6ZjbxC/10109052857.pdfIn PDF document text
    • http://xilibinebosapeg.mywebcommunity.org/94722363463.pdfIn PDF document text
    • http://mezoterilijixa.22web.org/android_developer_cv_template.pdfIn PDF document text
    • http://wivaserana.mywebcommunity.org/kufenuledivamipupujuno.pdfIn PDF document text
    • http://wopedejani.iblogger.org/vuvibosatamugaxepo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/momopiwadogilitipumi.pdfIn PDF document text
    • http://junirawikuxu.epizy.com/phonics_practice_book_kindergarten.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/10428608903.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/adobe_flash_player_chrome_out_of_date.pdfIn PDF document text
    • https://4e4301d6-cc9a-4939-960a-6b497c1efea6.filesusr.com/ugd/d78803_75a86dec35824ce0a8f4883da95284be.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kefodek/kotababafinozunakojeboz.pdfIn PDF document text
    • https://b9264059-5ce6-458a-812b-58b21e0c51d1.filesusr.com/ugd/9a3dc1_0ca0512ec6a34da290426309209ae2de.pdf?index=trueIn PDF document text
    • https://8271b8e8-1520-4b18-8785-2fafc8cd33e6.filesusr.com/ugd/efc97f_2cc40d41df964bf2bbb5d9df4c707f36.pdf?index=trueIn PDF document text
    • https://29c5b005-6627-40e3-9da1-9f9d3dbc34dc.filesusr.com/ugd/7ad284_e90bd47d48d042f4bd0be1cb4c259758.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/saponification_of_coconut_oil_chemical_equation.pdfIn PDF document text
    • https://f1801c53-b3f5-4b94-a9b3-4bb8eb376a66.filesusr.com/ugd/af633f_f83b3360d6c64567b5805161fffe5b60.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD224 5548 bytes
SHA-256: 797c8f03e4c561bc14d5b8c545f0f841d74ea2df60bf700658e11198216dea6a
font_01_sfnt_off0000e4f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F7 11148 bytes
SHA-256: 82ae3ff2f59bacf36e3a550890c29e55847808db22872888a27f7ae25f4528a4

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