Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ba098de45d31e48…

MALICIOUS

PDF

74.9 KB Created: 2021-05-02 21:03:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 44c9d17812c117b291c7f1b676507e90 SHA-1: 14d8e4537b5271ea4d814bd12ba62a79593d8288 SHA-256: 1ba098de45d31e481158b262ba4984fbf0a862f9f7d980818e7466db6e8ed4b1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
  • 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://mezovuduw.ru/strik?utm_term=how+do+you+reset+a+kindle PDF link annotation
    • https://cdn.sqhk.co/sadopore/hdZgdia/zadufilonubunefakapifa.pdfIn PDF document text
    • https://jubagimijan.weebly.com/uploads/1/3/5/3/135333733/9a4857d319.pdfIn PDF document text
    • http://gelupulofevabek.medianewsonline.com/airworthiness_advisory_circular.pdfIn PDF document text
    • https://luxaxezasu.weebly.com/uploads/1/3/1/3/131398230/fagavozamajavaduwut.pdfIn PDF document text
    • https://nabidojanafo.weebly.com/uploads/1/3/4/4/134455463/0a0aa5e2765.pdfIn PDF document text
    • https://dirogine.weebly.com/uploads/1/3/0/7/130775503/mupexobeb_jazelu_tuxed.pdfIn PDF document text
    • http://rajeziriga.scienceontheweb.net/tubojovesilawawi.pdfIn PDF document text
    • http://fajamad.mypressonline.com/putilozuvugozenakafodab.pdfIn PDF document text
    • https://cdn.sqhk.co/zezinojox/gkJijHz/xujeduwalelazotazire.pdfIn PDF document text
    • https://babiweperes.weebly.com/uploads/1/3/5/3/135347107/rovazemogugokag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kuzelewekupe.epizy.com/what_foods_to_avoid_for_low_fodmap.pdfIn PDF document text
    • http://sesumedafe.epizy.com/blue_parrot_b250xt_amazon.pdfIn PDF document text
    • http://pepezuvizomu.rf.gd/bandon_dunes_course_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/what_is_meant_by_quality_management_system.pdfIn PDF document text
    • http://riwugiboturom.epizy.com/vadufop.pdfIn PDF document text
    • http://bebewijelukisa.epizy.com/antimicrobial_drugs_list.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/16313141834.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_off0000df0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0F 5040 bytes
SHA-256: 88496307350267b7a311bcb9c208a06e595a04819ca06b546c92c5ed6b82d5bb
font_01_sfnt_off0000f057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF057 19460 bytes
SHA-256: 9dcb174d02460da8bcc47f27c87c38ea9bc41d5a5d09031169c0e2ae2ab6b650