Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee7adea954fabe51…

MALICIOUS

PDF

80.3 KB Created: 2021-02-17 04:41:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d5985900d2027d84559b2297d807c5e9 SHA-1: bc30aab573346e4e6faae74e3cd799e35f2ce6de SHA-256: ee7adea954fabe51a9366e090c9cfbb2c725f4503eae2880af283b042f2c8883
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'baarspo.ru' which is likely the primary malicious destination. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed to host multiple links on disposable domains, further supporting a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/strik?utm_term=sig+sauer+p250+22lr+slide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370989/normal_5fc6295eb07f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402297/normal_601d33b0bbfa5.pdfIn PDF document text
    • https://cdn.sqhk.co/ragojagef/jdULkyG/wiruxapomujupupuwawukud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386839/normal_602c629bd74a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460970/normal_60073839ec16b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389358/normal_600f7e45056c5.pdfIn PDF document text
    • https://cdn.sqhk.co/kuruwoke/ceXnheh/talking_parrot_for_sale_in_pakistan.pdfIn PDF document text
    • http://acgmgroup.ru/delonghi_magnum_radiator_heater_manualm6vax.pdfIn PDF document text
    • https://cdn.sqhk.co/pipidopowewe/dmahcVs/66693436829.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388280/normal_5fec54b89d6c3.pdfIn PDF document text
    • http://mpvideo.org/cv_template_generator_freendcf4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474475/normal_601bbfd2d1905.pdfIn PDF document text
    • https://cdn.sqhk.co/xawefigi/Oighdge/94503947839.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bonizeza.epizy.com/wexudavapurotederu.pdfIn PDF document text
    • http://fonajuwowo.epizy.com/answering_service_houston.pdfIn PDF document text
    • http://tefuguwo.epizy.com/kejodanogaraxize.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_off0000fc7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7C 5628 bytes
SHA-256: 940933789ddf93d7330435f527ffe25ed9f546140d224f4ba8824337984c69bc
font_01_sfnt_off00010fb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB1 10780 bytes
SHA-256: d4447cf9a62443559c2c0161f09bedff0622dbff7176d65f403fcf0313b50ce1

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