Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f82e177167c3502…

MALICIOUS

PDF

69.3 KB Created: 2021-10-05 11:16:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 0f61314c4237324c3ef144c48d6b52d6 SHA-1: b34047300be713c83c9e282e766c1d999ec998c5 SHA-256: 2f82e177167c3502fabb10449d216bbd87fe353635da40424052dfdcb9789ae8
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also hosts a large number of external URIs, many pointing to disposable domains, indicating a link farm likely used for phishing or distributing further malware. The ClamAV detection and ML classifier strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://chikatere.com/Upload/files/nigopumebitujupabijaru.pdf In PDF document text
    • http://autoescuelatosal.com/galeria/files/11079593423.pdfIn PDF document text
    • http://kleinschadenexpert.de/userfiles/file/74486052340.pdfIn PDF document text
    • http://jingluo.net/uploadfiles/files/dijizikozarivifebugire.pdfIn PDF document text
    • http://metalzilembo.it/userfiles/files/xupawiporepef.pdfIn PDF document text
    • https://gulf-rope.com/images/bulk_images/files/velefikovol.pdfIn PDF document text
    • https://www.esicm-old.org/admin/lib/ckfinder/userfiles/files/dibinedaderuj.pdfIn PDF document text
    • https://soudurelauziere.ca/upload/editor/file/vamusepuzediguzofelubeboz.pdfIn PDF document text
    • http://novafish.it/userfiles/files/10214826753.pdfIn PDF document text
    • http://neza.cz/UserFiles/File/68591356866.pdfIn PDF document text
    • http://globalfeedindustry.com/upload/files/37503965419.pdfIn PDF document text
    • https://yourownadviser.com/ckfinder/userfiles/files/99061341214.pdfIn PDF document text
    • https://ajur.rest/uploads/userfiles/file/71137617020.pdfIn PDF document text
    • https://uetty.xyz/js/ckfinder/userfiles/files/kirafozotaxunesegi.pdfIn PDF document text
    • http://platcometals.com/images/file/pufemesulavemivon.pdfIn PDF document text
    • http://konferencii.org/js/ckfinder/userfiles/files/bidorive.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614ae26d96532---gulunuk.pdfIn PDF document text
    • http://albertf.madteam.net/ckfinder/userfiles/files/sadezonizilonavazi.pdfIn PDF document text
    • https://kheops-so.fr/ckfinder/userfiles/files/92463113307.pdfIn PDF document text
    • http://seatraderhk.com/userfiles/kenidujimolar.pdfIn PDF document text
    • http://www.examnotice.in/uploads/files/35451858812.pdfIn PDF document text
    • http://gift-founder.com/archive/upload/files/mulimafafeze.pdfIn PDF document text
    • http://tsg-vaganovskoe.ru/ckfinder/userfiles/files/97266841893.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=resource+request+algorithm+in+osPDF link annotation
    • 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://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_off0000afae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFAE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c7c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7C5 10968 bytes
SHA-256: b00058ec1cce26c1501f9480ed3b563ba3043c5cea317ddb069c623edc22f8e0
font_02_sfnt_off0000e0c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C1 15348 bytes
SHA-256: 6e6fbace428ebf4ae31056f1e6db458c18c355311a4ff6a76126c30dff43ea5f

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