Malicious PDF — malware analysis report

Static analysis result for SHA-256 54f7753d701263bf…

MALICIOUS

PDF

123.9 KB Created: 2021-03-02 21:50:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 26343f66edc51d8a5ee9fc7cb1b204a4 SHA-1: 5814ba09be4f802819f5c43ab12d69226a08eb01 SHA-256: 54f7753d701263bf0a05490449f76cbcba758c12509accc57b0d31665ffd7963
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting it is part of a link farm designed to drive traffic or host phishing content. The document body, though heavily obfuscated, contains keywords related to a vehicle manual, likely a lure to encourage clicks on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • 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://baarspo.ru/wix?keyword=vw+touareg+tdi+manual+transmission PDF link annotation
    • https://fuvepuzineg.weebly.com/uploads/1/3/4/4/134463404/gawitimarot.pdfIn PDF document text
    • https://wafulezejo.weebly.com/uploads/1/3/4/7/134748518/luvipivabepaxozal.pdfIn PDF document text
    • http://health2health.online/temigobijb.pdfIn PDF document text
    • https://figagukedeliv.weebly.com/uploads/1/3/4/0/134040575/labox.pdfIn PDF document text
    • https://gakulenem.weebly.com/uploads/1/3/1/4/131437742/vorilo_xibotejij.pdfIn PDF document text
    • http://copytoshka.ru/zoxewisazefesagudexidebeyo895.pdfIn PDF document text
    • http://drnextact.xyz/what_is_material_in_science_termscyk6e.pdfIn PDF document text
    • https://pemolodubi.weebly.com/uploads/1/3/6/0/136052155/kirowapasaw.pdfIn PDF document text
    • https://pewukuma.weebly.com/uploads/1/3/4/7/134762228/pupofurel_mujopevok_kebolawo_bekufukalesib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473340/normal_603b3e7ba95a7.pdfIn PDF document text
    • https://labifunuvi.weebly.com/uploads/1/3/4/8/134847398/49ed3da2dff.pdfIn PDF document text
    • https://votebefi.weebly.com/uploads/1/3/4/7/134715150/ninuv.pdfIn PDF document text
    • http://autolombardpro.ru/club_car_parts_and_accessoriesesjtl.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/rudelazifizuvo/66626956880.pdfIn PDF document text
    • http://jimubawemise.rf.gd/vunegowetasezomez.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15859 14772 bytes
SHA-256: 966e7d2c857e820dae2947ceb5c4e25e9a7fd92b94bc039c0fa0d365f0b24060
font_01_sfnt_off00018804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18804 5204 bytes
SHA-256: 6b817db7926539dafe89350451928404b5f6bcf0e80722dc2df87cafd0b763a9
font_02_sfnt_off000199b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x199B1 16372 bytes
SHA-256: 4d527693d413d19308d56a740e1889d6e0b41bb9a989bdaf932d710e69820811
font_03_sfnt_off0001cce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CCE2 16060 bytes
SHA-256: ae97ebdbf5cb6679ee3ae7f6f8963da9ec2437ada1f672a33085bc8cbe806833

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