Malicious PDF — malware analysis report

Static analysis result for SHA-256 79e548523f2d28ff…

MALICIOUS

PDF

78.2 KB Created: 2021-03-28 19:49:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 256d589e6b6f4e611d7325781bbdef48 SHA-1: 10d3fc18d86b2bfaee7b653795158742bc35e169 SHA-256: 79e548523f2d28ffa065510fa52389e6ea98b94d0fbd92b6f9feebd52cba3c43
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

Heuristics 6

  • 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.
  • 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://dugedepap.ru/award?keyword=oil+and+gas+companies+in+nigeria+pdf PDF link annotation
    • https://ranetaxute.weebly.com/uploads/1/3/4/8/134886021/3540649.pdfIn PDF document text
    • https://fademorojotuk.weebly.com/uploads/1/3/1/3/131379253/nadapota_fasevonokatem.pdfIn PDF document text
    • http://gopekulodu.22web.org/que_es_calidad_ambiental.pdfIn PDF document text
    • https://ruxebawinafa.weebly.com/uploads/1/3/0/7/130776533/famomixi-sujepukiso-tolemegipi-rajitixejuz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebfb268c-4981-41ac-86cd-e74a9569b7c0/52322802038.pdfIn PDF document text
    • https://73c25812-7308-4b32-b985-10e2a25710ca.filesusr.com/ugd/5b604d_630b809e0a724cc4b7616f5a4d9da771.pdf?index=trueIn PDF document text
    • http://mobaramitutukox.rf.gd/basic_laboratory_glassware_and_equipment.pdfIn PDF document text
    • http://dikewovob.epizy.com/7489556530.pdfIn PDF document text
    • http://javuturevof.rf.gd/zambian_catholic_bemba_songs.pdfIn PDF document text
    • https://c22e5cf4-338a-4003-9cad-c1cb0be29285.filesusr.com/ugd/3db607_b0f950f9638047c68f54516f8ee22a0d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0e7dc80-9eca-4ae0-b8f6-c625e5589532/garmin_edge_510_bundle_best_price.pdfIn PDF document text
    • https://746420f6-3007-491b-ba72-fd43be5094e5.filesusr.com/ugd/277b62_0c6430c6880f47228de7e081d6d0c89c.pdf?index=trueIn PDF document text
    • http://pabekalu.rf.gd/xobubof.pdfIn PDF document text
    • https://8d5bcf17-53f2-4f21-b585-7a27aef14131.filesusr.com/ugd/7baf93_929a6dacf9c34721ae4e2d844c5ebdaf.pdf?index=trueIn PDF document text
    • https://cfff6b0e-fc0f-4d9c-a983-c0e60c8b2bfd.filesusr.com/ugd/c637e3_ab6f71991f5147959c949c7df2eca08d.pdf?index=trueIn PDF document text
    • https://c546c886-5aa5-41cc-813f-4ed3e146772c.filesusr.com/ugd/b3e52d_ec99e031a2ff4966bef1582cb2b6a30c.pdf?index=trueIn PDF document text
    • http://dinixebun.epizy.com/folder_template_design_for_company_free.pdfIn PDF document text
    • http://selomuxoper.epizy.com/wufedududanupanipud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdd1defb-963b-49e3-a3cc-6279511ffb9b/how_to_use_dewalt_18_gauge_brad_nailer.pdfIn PDF document text
    • https://e57d8632-f742-4524-ada6-9cdf759d9f13.filesusr.com/ugd/b0cb2d_3766387db2f74553a5f4e37d92d77be6.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F9 5504 bytes
SHA-256: a7c100fe974dea7b7c175a67682c6b7f21f51e264c75edfeb9c625274c45a564
font_01_sfnt_off0001039a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039A 11976 bytes
SHA-256: 513e7e7ab40a946dd2a671e7917770255b8f42c6e5d8e23d11bb2e5d1a5a643f

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