Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb1845b038a89ad3…

MALICIOUS

PDF

74.8 KB Created: 2021-03-11 11:15:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d133f8dbf95de93253c782b78722d8f1 SHA-1: 760f17f714a64de00c62130173a3be88471ea1b9 SHA-256: bb1845b038a89ad33bb00cfca356ea237e68b704deaa5ce17f7db8c3b1161530
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 0.9989

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://crophysi.ru/award?keyword=aberration+of+normal+development+and+involution+pdf PDF link annotation
    • http://creamwalls.space/harry_potter_book_set_ebay_uktieyf.pdfIn PDF document text
    • https://cdn.sqhk.co/madagijoj/d7hj4DU/8399180876.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvevalor/d1f2gif/street_racing_movies_on_netflix.pdfIn PDF document text
    • https://cdn.sqhk.co/tokafumotebi/xghjjef/11st_6lb_in_kg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402964/normal_6018b44b06c82.pdfIn PDF document text
    • http://mixagonidik.22web.org/13089447926.pdfIn PDF document text
    • http://manekobe.22web.org/topolasonataxofazewijeb.pdfIn PDF document text
    • http://milanomoda-italy.site/toggle_tv_guide_vasantham90syt.pdfIn PDF document text
    • https://cdn.sqhk.co/fokatekox/oehhTic/minecraft_lan_proxy_dedicated_servers_on_ps4_xbox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451757/normal_600ef8f4efcf2.pdfIn PDF document text
    • http://tefosewun.22web.org/25888858742.pdfIn PDF document text
    • https://cdn.sqhk.co/tusadopovet/6jhzoih/guess_t-_shirt_men_s_price.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482188/normal_601198c11f326.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487399/normal_5fdb559c3abfe.pdfIn PDF document text
    • https://cdn.sqhk.co/kinibemazoz/NHfhaj0/tukinipomumusuxemaki.pdfIn PDF document text
    • http://netzamka.ru/evinrude_6_horse_outboard_motorz3lk0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424982/normal_6035680897885.pdfIn PDF document text
    • http://argo-tourism.com/355186734574wc8z.pdfIn PDF document text
    • https://cdn.sqhk.co/difigobon/jiibmih/89967968376.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wimarewixogax.epizy.com/icivics_branches_of_power_worksheet.pdfIn PDF document text
    • http://nokizotef.rf.gd/wegokarufos.pdfIn PDF document text
    • http://jepuvituxog.rf.gd/zasadazapegomid.pdfIn PDF document text
    • http://fupotuz.rf.gd/62383181132.pdfIn PDF document text
    • http://sasugokomelu.rf.gd/friends_tv_show_logo_template.pdfIn PDF document text
    • http://fanuzisi.epizy.com/audrey_body_scanner_prank_2018_app.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://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_off0000d29e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD29E 5196 bytes
SHA-256: dc2eb6bf981c2024135d06fdc3a41a0187b6276d25b9728acb3b4af4dcf5160d
font_01_sfnt_off0000e439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE439 10208 bytes
SHA-256: fd6615c29b352babc2ef902353be3821c57ba63cf93765a519f5fdc029b3caa9
font_02_sfnt_off0001075d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1075D 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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