Malicious PDF — malware analysis report

Static analysis result for SHA-256 1186d3d5731bde38…

MALICIOUS

PDF

89.8 KB Created: 2021-02-19 13:14:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e9c13eaa4b6ed264548602400fb932f1 SHA-1: 32abf4412e2f6a368767fd13bc027a37eea30c95 SHA-256: 1186d3d5731bde38f0598305892933d8554a1ef1e80f112c4a50fdfc2123936a
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of these links, 'https://baarspo.ru/strik?utm_term=how+to+use+the+lincraft+knitting+machine', is flagged as suspicious and likely leads to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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.
  • 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=how+to+use+the+lincraft+knitting+machine PDF link annotation
    • https://cdn.sqhk.co/vozeseseber/ghJggih/jijuvabugowufiteguburuv.pdfIn PDF document text
    • https://cdn.sqhk.co/xubupigegi/iVgYnjb/2471103022.pdfIn PDF document text
    • https://cdn.sqhk.co/mitugejaxel/dhb1kA0/barbie_dreamhouse_adventures_season_4_episode_20.pdfIn PDF document text
    • https://giboritozi.weebly.com/uploads/1/3/1/3/131379296/451269.pdfIn PDF document text
    • https://cdn.sqhk.co/pegipoveridi/gXhblgg/beer_pong_tournament_auckland_2020.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/xajowu/free_indesign_template_ideas.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/airline_commander_apk_latest_version.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/nonaxefozutotajadekufo.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/dice_roller_google_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/guide_taille_blouson_moto_dainese.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/schengen_visa_application_form_free.pdfIn PDF document text
    • http://nuxumejaxumem.epizy.com/android_box_m8s.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF37 5412 bytes
SHA-256: 33ef0532b3648c7e58b146362558eadaad4452cdccb3ea393b4cbb7169fbe570
font_01_sfnt_off00011184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11184 2876 bytes
SHA-256: a39ddc95372f4d5b94f05b6e8652fbc9a3a67a50f4d61f34eb69e255030dd006
font_02_sfnt_off00011db5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB5 10808 bytes
SHA-256: 5f19c06e30614d961256dbf6fdd9dc4122325858e477a0c6d5f73e219cf937f1
font_03_sfnt_off000142f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142F4 16756 bytes
SHA-256: f4e5ca0a38c42386a7fe8aeb34cce3c0ded3af0ad5fa64e3aff05650a83a0177

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