Malicious PDF — malware analysis report

Static analysis result for SHA-256 c84befad60b5e300…

MALICIOUS

PDF

75.7 KB Created: 2021-03-25 03:16:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba8fd03e1af6b28fc0d8e8649f6cd514 SHA-1: bcd28f17bdec81693b3f624647d56387aa223c20 SHA-256: c84befad60b5e300b473bc506e2c585ebe28cffd13086dbce76c9c977ed2cd40
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and ML classifiers as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The presence of numerous embedded URLs, many hosted on disposable domains, strongly suggests a phishing or malware distribution campaign. While no scripts were explicitly extracted, the PDF structure and embedded URIs indicate an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/wix?keyword=colorado+springs+police+blotter
    • http://gisoboxizaza.mygamesonline.org/formal_and_informal_email_writing.pdf
    • http://mejumafegebameg.mygamesonline.org/xegiteledezop.pdf
    • https://cdn-cms.f-static.net/uploads/4369142/normal_6058db143f6a9.pdf
    • https://ravuripuzi.weebly.com/uploads/1/3/5/9/135958818/nijamokinunivugupa.pdf
    • https://pupaxuge.weebly.com/uploads/1/3/4/0/134096873/d94c4ca9e.pdf
    • http://eeuuurrrrr.space/62024932487aj629.pdf
    • https://cdn-cms.f-static.net/uploads/4490929/normal_60329f6b581c2.pdf
    • https://cdn.sqhk.co/vakolitakap/f7fehh1/52904181522.pdf
    • http://evilcheats.fun/10908573702te7js.pdf
    • https://cdn.sqhk.co/gituridewo/jaLijLT/okay_good_night_in_english.pdf
    • http://barcaporirternet-interbank-pe.com/limbo_prime_neuroptics_pricedn5oq.pdf
    • http://interior.estate/kisabusuremetopirfi8ez.pdf
    • http://tamakedesununod.mywebcommunity.org/samsung_model_un32n5300afxza_remote_control.pdf
    • https://cdn.sqhk.co/jirudumom/ibgjjiq/dragonvale_rift_breeding_hints.pdf
    • http://mokemowowove.mygamesonline.org/29602736985.pdf
    • http://difanitukovu.mywebcommunity.org/jemuvud.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ddbaec67-ac58-4ffd-9d49-cf9841fe5817/dogiwufuzepikoviwu.pdf
    • https://uploads.strikinglycdn.com/files/7c5494d4-386d-429d-9318-da8e2c95ef55/nutewuxuniva.pdf
    • https://uploads.strikinglycdn.com/files/dc6c93af-66f5-42b1-b561-d1b1558b1c30/simple_present_wh_questions_exercises_with_answers.pdf
    • https://uploads.strikinglycdn.com/files/28ecf194-7813-443e-acb0-067d5d298279/optiplex_790_memory_specification.pdf
    • https://uploads.strikinglycdn.com/files/53adc362-ce37-47fc-8207-9bc5baa7726e/craftsman_yt3000_transmission_belt.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8ca.bin
5b2071f625d25f52dd2f87b958eddf0a1c6a05440d78c5bb39be86729073bc36		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CA 5288 bytes
font_01_sfnt_off0000fac6.bin
4ea24b48ed471b8a47f018b9f3dd082094c9c2e81b244594506b28d2a79d7023		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC6 11608 bytes

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