Malicious PDF — malware analysis report

Static analysis result for SHA-256 72bc77e1edd1bc84…

MALICIOUS

PDF

74.2 KB Created: 2021-01-24 09:26:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 9659de9b39a1a84c6ca406770ab45c7c SHA-1: 6210ca6dbf71ca1ddb2d930f2c6fdb437defecdc SHA-256: 72bc77e1edd1bc84a652e1a56d5f93bf07ef21fc45c85ed9e8dec5c7384e80b9
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a phishing or scam attempt to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards a malicious document designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://traffset.ru/123?utm_term=rocketeer+helmet+for+sale PDF link annotation
    • https://site-1178312.mozfiles.com/files/1178312/9998419019.pdfIn PDF document text
    • http://laguduzimunek.22web.org/27383643910.pdfIn PDF document text
    • https://cdn.sqhk.co/bagojenul/bRjcrje/street_dunk_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gatavikap/gcSibhi/world_war_2_mod_apk_offline.pdfIn PDF document text
    • https://site-1177548.mozfiles.com/files/1177548/matrix_matrix_multiplication_complexity.pdfIn PDF document text
    • https://cdn.sqhk.co/xojelumegasi/zjemhbl/katurusowedakixugejid.pdfIn PDF document text
    • http://gimakelodikovij.iblogger.org/wejawaruf.pdfIn PDF document text
    • https://botoriki.weebly.com/uploads/1/3/2/6/132682976/nelidewix.pdfIn PDF document text
    • https://site-1166673.mozfiles.com/files/1166673/diy_pom_pom_pokemon_book.pdfIn PDF document text
    • https://site-1191779.mozfiles.com/files/1191779/27690812778.pdfIn PDF document text
    • https://rudusixan.weebly.com/uploads/1/3/0/7/130775573/minowasiku.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafanez/56hjzib/8559649834.pdfIn PDF document text
    • https://dumisoxi.weebly.com/uploads/1/3/4/6/134625223/469291.pdfIn PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/k1fjghh/vidmate_all_downloader_2019.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/gifiz/trinus_cardboard_vr_apk_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/4426352084.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromisixinolib/kajidimel.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/adrammelech_ff12_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/54112511291.pdfIn PDF document text
    • http://bavidoripo.epizy.com/57839290122.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/24195938802.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/xumoradawubefojepiti.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/xojaputesasapitofaxogolon.pdfIn PDF document text
    • http://zerakunutage.epizy.com/6917405846.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_off0000e468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE468 5192 bytes
SHA-256: 50ac61829bb71c30b37f94fb988013516646627f45f749737b86ca5e6c84f4b2
font_01_sfnt_off0000f5f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F2 11056 bytes
SHA-256: 91a2ca691c0ce05095a86b143a59f1c3dd6c9276c0e7ef4fb6f9ebd124e5492a

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