Malicious PDF — malware analysis report

Static analysis result for SHA-256 726582fc0c5d3861…

MALICIOUS

PDF

80.8 KB Created: 2021-03-23 04:45:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 63f78896992243dab177824840bf6f2e SHA-1: 5bb6ba12b2b3c449cf8ed7d0e3d540d6879cdc22 SHA-256: 726582fc0c5d386151f00db107ac35c3f83087c9707832de909c4912f5f71330
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. The document body, though heavily obfuscated, contains text related to 'Smackdown live stream twitch', suggesting a lure to attract user clicks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/wix?keyword=smackdown+live+stream+twitch PDF link annotation
    • http://majubavilusuda.iblogger.org/canciones_infantiles_letras_cortas.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/odii3ge/zasarazoke.pdfIn PDF document text
    • http://storeeu.info/sojujizp8fm.pdfIn PDF document text
    • https://cdn.sqhk.co/wajerewuwer/Ngepgdp/reflex_test_knee.pdfIn PDF document text
    • http://site-shop.xyz/danunatnd1lp.pdfIn PDF document text
    • https://cdn.sqhk.co/mivufarowiwi/64gdhjj/mai_teri_chunariya_lehrayi_audio_song.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391305/normal_5fd5f484517e6.pdfIn PDF document text
    • https://cdn.sqhk.co/naziwixolagu/XiatRRx/stickman_warriors_2_epic.pdfIn PDF document text
    • https://cdn.sqhk.co/rarukaboz/bgf2cih/37450988638.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403960/normal_604dedef63d9e.pdfIn PDF document text
    • https://cdn.sqhk.co/gidulikegel/acidnwF/23100631596.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/ghyZcib/59266756089.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/serogajugomiji/kokagokikebevax.pdfIn PDF document text
    • http://sadopumudoraka.epizy.com/nefafuziramu.pdfIn PDF document text
    • http://nidomovux.epizy.com/bedixe.pdfIn PDF document text
    • http://vetemux.epizy.com/what_does_a_sub_zero_fridge_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/combine_excel_sheets_to.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_off0000fc86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC86 5496 bytes
SHA-256: b92b3c2ec8c969c41a5139aa170ee6a2455d924dc6113126aaf2c00ef6ae1d77
font_01_sfnt_off00010f21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F21 11528 bytes
SHA-256: 4b48fde0aa66a313db9da1590a9edf3360817519fdd61acdbdf3fe5e5d013269

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