Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a296332fb69361c…

MALICIOUS

PDF

105.8 KB Created: 2021-02-26 17:26:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: dbc3267b8ff3de8ae17c29c258573866 SHA-1: 0af14c77dbb174d6d094ba6a65e06b2b856e710f SHA-256: 6a296332fb69361c18e4698e0506b56f51d5d0f6b62960d48c8b28b7b0deed19
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though partially obfuscated, contains text related to 'transition words for conclusion college', likely a lure to disguise the malicious nature of the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://nipisod.ru/123?utm_term=transition+words+for+conclusion+college PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4482426/normal_601985bf208d6.pdfIn PDF document text
    • https://vilofezilo.weebly.com/uploads/1/3/0/7/130740065/salilivewupubugose.pdfIn PDF document text
    • http://huaweistoreukr.xyz/53597094197j3bv1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389823/normal_6018d35662855.pdfIn PDF document text
    • https://remogomati.weebly.com/uploads/1/3/4/7/134748537/masorupip_fovek_lasubisop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455377/normal_6028b80ac0bae.pdfIn PDF document text
    • http://lolibixavug.22web.org/80535520011.pdfIn PDF document text
    • https://cdn.sqhk.co/gutifusuf/gj8lh5q/62220373497.pdfIn PDF document text
    • https://cdn.sqhk.co/savunowudob/hOXYjgY/las_vegas_tourist_guide.pdfIn PDF document text
    • https://garagagu.weebly.com/uploads/1/3/4/3/134364865/zaropovazogizik.pdfIn PDF document text
    • https://fuxovibafisiboj.weebly.com/uploads/1/3/0/8/130874455/fbb363.pdfIn PDF document text
    • https://cdn.sqhk.co/vovoritufi/6jagfyY/book_my_ufone_golden_number.pdfIn PDF document text
    • http://bumawusuka.mypressonline.com/39311591391.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.thdl.org/http://www.thdl.org/TibetanIn PDF document text
    • http://vakewexapenox.epizy.com/piberufonoxesififenowupu.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://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlTibetanIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000146f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146F6 5228 bytes
SHA-256: faff8aa8ffd25f136c8db6053ec702fc2384dc150294505c91c3b51b43bcbfcc
font_01_sfnt_off000158e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158E2 9148 bytes
SHA-256: 94d2743e31da0f1da320b0684a1035e5ce0f05cedb4c96fceb0cbf9fd81f6b17
font_02_sfnt_off00016b35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B35 2056 bytes
SHA-256: 72ccfcfc875bc56f05fc01d7bc4230edc1ea17a5b434b2c7f9408a235af9ee8c
font_03_sfnt_off0001741d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1741D 10852 bytes
SHA-256: c3beba3bc02cd08484585071a8cde0cf94e8c454ca557aaaf54507a91692e8ba

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