Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bc67a6399830404…

MALICIOUS

PDF

78.6 KB Created: 2021-04-06 21:41:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c0b8cb06069efeac0ecbd9da6df5dddc SHA-1: 014fab49167b60b6493b3170c9ec364504730e2b SHA-256: 9bc67a63998304048587509fcd9dc39a96b74a8f3a9af1a1b14857ce1c443b1b
246 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. It contains a link farm with numerous external URLs, many hosted on disposable domains, and impersonates Facebook to lure users. The primary lure appears to be related to finding Discord IDs on Android, likely a pretext to drive clicks to the malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://kobuzonoge.weebly.com/uploads/1/3/1/4/131452837/rimabo_lamasuwewunuto_tafakubazaret.pdf.
  • 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://gimoguvi.ru/wix?keyword=how+to+find+your+discord+id+on+android PDF link annotation
    • https://kobuzonoge.weebly.com/uploads/1/3/1/4/131452837/rimabo_lamasuwewunuto_tafakubazaret.pdfIn PDF document text
    • https://cdn.sqhk.co/labifikup/gYd4mUr/schema_electrique_interrupteur_ampoule.pdfIn PDF document text
    • https://jetovalanowu.weebly.com/uploads/1/3/0/7/130739462/nariwitojevokawifa.pdfIn PDF document text
    • https://kaperimivegorew.weebly.com/uploads/1/3/4/3/134371305/8327891.pdfIn PDF document text
    • http://homeolimp.com/genie_intellicode_chain_glide_gcg350l_manual7bb75.pdfIn PDF document text
    • http://miiliioner.xyz/jot2_task_2mb90q.pdfIn PDF document text
    • http://ourfanz.com/750711854989behv.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://zapineri.weebly.com/uploads/1/3/4/7/134707132/3589996.pdfIn PDF document text
    • https://cdn.sqhk.co/nejijilo/hTgeAOo/pomor.pdfIn PDF document text
    • https://cdn.sqhk.co/xibetevoxaj/Jib0rij/ant_family_and_order.pdfIn PDF document text
    • https://dobuxodujunov.weebly.com/uploads/1/3/2/7/132741154/jibujasugum-vuwitoj-tanuj-donuw.pdfIn PDF document text
    • https://cdn.sqhk.co/duzixulok/hhgiNeO/sales_tax_steamboat_springs_colorado.pdfIn PDF document text
    • https://cdn.sqhk.co/kutajanode/SjaFhdg/modern_warfare_tracker_perk_counter.pdfIn PDF document text
    • http://obsluzhivanie-kompyuterov.moscow/romemazojirugaba3dpdu.pdfIn PDF document text
    • http://clipshd.design/android_checkbox_click_listenerwval8.pdfIn PDF document text
    • https://cdn.sqhk.co/xugikokazo/jnsgehd/77878080463.pdfIn PDF document text
    • https://cdn.sqhk.co/vukupamita/iiijhe8/27127278451.pdfIn PDF document text
    • http://instapresent.site/guxojilawudebefafasowegaayqji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/anger_of_stick_5_hackeado_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/charlotte_s_web_script.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4ED 5140 bytes
SHA-256: 6981dba630057d9ab984706fdbf2240d0c85d13831151e7affe7edc486408190
font_01_sfnt_off00010694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10694 11568 bytes
SHA-256: 1a57f124b38bd75045f336f8e892669afc7be68afb4c46fa9ce5c79b40aef2f6