Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6e2faa61572ef13…

MALICIOUS

PDF

78.4 KB Created: 2021-03-07 13:43:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d465de9cac7499dd520b3f8c8dd61eb7 SHA-1: 95fc30bb359ef78f0f11a6daacb28801b0d9b6e3 SHA-256: c6e2faa61572ef13605a52d0a4de8412e10f36c7e840d532cba4b01edc4c7e91
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9993

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 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://golowaki.ru/strik?utm_term=dometic+rv+furnace+wiring+diagram PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4384048/normal_6003d274dac80.pdfIn PDF document text
    • http://jagefefixod.22web.org/singular_and_plural_nouns_worksheets_first_grade.pdfIn PDF document text
    • http://dejevixumuvele.22web.org/universidad_del_tolima_sede_bogota_precios.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425737/normal_601586297379a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443823/normal_5ff8a5f65e1fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489587/normal_602762db2ba80.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455375/normal_5fca708a5aea6.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/8e49754d-78be-4c9a-bb81-858972fca20f/breadman_plus_automatic_bread_maker_manual.pdfIn PDF document text
    • https://3ecc1590-a62a-4317-9845-4395e9141a58.filesusr.com/ugd/237bf7_072399d5be594392b3571d1e866b51da.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/nigidenizunijit.pdfIn PDF document text
    • https://56076a71-1b70-41e8-afe1-d547c394b4ee.filesusr.com/ugd/ab0d05_f65ed65010414ffb8aff40d4e7258a60.pdf?index=trueIn PDF document text
    • http://mugoxox.epizy.com/ashton_manual_book.pdfIn PDF document text
    • http://katoxez.rf.gd/lenel_onguard_client_installation_guide.pdfIn PDF document text
    • http://bususetut.epizy.com/cps_sentencing_guidelines_burglary.pdfIn PDF document text
    • http://wijokinesuj.epizy.com/mapuzutitepesorifor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/673c0ad7-ddd3-4188-b514-19349b6e4011/do_croissants_have_carbs.pdfIn PDF document text
    • https://1c019786-7048-4615-837a-ae53f087c4ae.filesusr.com/ugd/8b4172_cd6f833d633d46278df635b6cd89bbbb.pdf?index=trueIn PDF document text
    • http://gobusef.rf.gd/kisaxowisofepemabipuk.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/resto_druid_guide_classic_wow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/265c2da3-fb76-469b-a3b0-7fd4e235661b/cs_1.6_cd_key_ifresi.pdfIn PDF document text
    • https://d1159ab4-cbf5-42eb-897b-83a5e94cd7da.filesusr.com/ugd/536122_4387ea925818415fa571c42ba5c69af9.pdf?index=trueIn PDF document text
    • http://dojomasamolazib.epizy.com/gantt_chart_template_pro_unlock.pdfIn PDF document text
    • https://18e99e0c-7034-4a8c-9069-267580a295b8.filesusr.com/ugd/b337f5_1adea1b7081143349d024282f9b81875.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_off0000f656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF656 5280 bytes
SHA-256: 69ebfb2e15da16581eb39279cdb4f67b89a9ec1cce64159b7379cffc4c75e4f1
font_01_sfnt_off00010852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10852 10720 bytes
SHA-256: 1d997470882193872e7f37f95babcd562c82be83d17f757495cc858dde02be4f

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