Malicious PDF — malware analysis report

Static analysis result for SHA-256 434089360e550c20…

MALICIOUS

PDF

83.2 KB Created: 2021-02-26 08:57:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 5d51bfe232ecac55d3a6055c45347325 SHA-1: 3852c3fce5f8ea9a1ff0bc8283ce56accdd9df89 SHA-256: 434089360e550c20128d82fdd5da59fc04a41da1597298ed14033fb506ad10c0
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9285

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://maypoin.ru/award?keyword=adobe+photoshop+cs3+bangla+tutorial+pdf PDF link annotation
    • http://bestunew.xyz/buzevojoranuvejedififaddgopl.pdfIn PDF document text
    • https://pawunotapi.weebly.com/uploads/1/3/1/4/131408062/jenuxe_runud_xogobij_fenulitig.pdfIn PDF document text
    • https://cdn.sqhk.co/fepexeguma/cmkS3oV/goxapoxoforulonamuzi.pdfIn PDF document text
    • http://nizavevorupuj.mywebcommunity.org/cuantos_cm_hay_en_un_metro_cubico.pdfIn PDF document text
    • http://carinsusa.com/how_to_do_taylor_series_expansionc6f7z.pdfIn PDF document text
    • http://biomanix.best/kevoxidikosnvoq1.pdfIn PDF document text
    • https://rofixuninapo.weebly.com/uploads/1/3/5/3/135313709/nixefulanewi-jaluwigijira.pdfIn PDF document text
    • http://lazujifoxupa.getenjoyment.net/how_to_clean_ratchet_straps_by_dirt_farmer_jay.pdfIn PDF document text
    • http://sepoxudozixo.sportsontheweb.net/maytag_quiet_series_100_dimensions.pdfIn PDF document text
    • https://cdn.sqhk.co/mixaluwekitu/hidiceo/first_strike_final_hour_apk_hile.pdfIn PDF document text
    • https://suwudaxodorepe.weebly.com/uploads/1/3/4/8/134885248/fepapobo-mawozijenep-nijarekujag-weget.pdfIn PDF document text
    • http://proita.fun/xorabemidaxgz2ta.pdfIn PDF document text
    • https://xasukibumit.weebly.com/uploads/1/3/4/7/134749231/resito-sudetixoju-sipipa-zefuzakovi.pdfIn PDF document text
    • https://mutolumikiwow.weebly.com/uploads/1/3/1/8/131872082/896b401aa4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/baxegezivumi/23416501592.pdfIn PDF document text
    • http://tuzuxutetug.atwebpages.com/65775610259.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10604 5592 bytes
SHA-256: 38d94f15a562a843d5fbe5315e8a973f54a1083966b4bc77728383e87937f87f
font_01_sfnt_off000118f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F7 10256 bytes
SHA-256: 42fc8aba81deb658b37a01cd96a66d0508117c79bceae7644b89bad7ac989a4e
font_02_sfnt_off00013c1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C1A 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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