Malicious PDF — malware analysis report

Static analysis result for SHA-256 dae09fcc4d0ae555…

MALICIOUS

PDF

78.0 KB Created: 2021-04-02 13:26:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a4137c991138272fec63cb8b86041a2c SHA-1: b1db372d155368a134ea9659bf82f752db1ee0f5 SHA-256: dae09fcc4d0ae5551151de3a9520702c54fdc4cf4b6250a0cb01e43077e3ff96
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9996

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://maypoin.ru/strik?utm_term=labour+relations+act+south+africa+2019 PDF link annotation
    • http://idealica-co.site/topomalunufex4bos5.pdfIn PDF document text
    • https://folemazilepi.weebly.com/uploads/1/3/1/1/131164248/xigesimapuju.pdfIn PDF document text
    • https://nokavapeselodes.weebly.com/uploads/1/3/4/6/134638024/5549588.pdfIn PDF document text
    • https://jiburivaduvu.weebly.com/uploads/1/3/4/4/134473865/9805101.pdfIn PDF document text
    • https://tamosumedov.weebly.com/uploads/1/3/4/0/134017363/sufapozusu-xawutibetebo-biriki.pdfIn PDF document text
    • https://xutevuper.weebly.com/uploads/1/3/0/9/130969179/66664.pdfIn PDF document text
    • https://cdn.sqhk.co/pigajifaw/kRGhgie/15696182152.pdfIn PDF document text
    • https://cdn.sqhk.co/zojixemem/G4gchde/balaxowopajosefebavubaxo.pdfIn PDF document text
    • https://muverepifakapi.weebly.com/uploads/1/3/5/3/135387058/derujaporipexaxozo.pdfIn PDF document text
    • http://www-sfr-fr-monespace.com/97440098240wh2ne.pdfIn PDF document text
    • https://matexofetuboso.weebly.com/uploads/1/3/1/4/131453592/4777121.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/dowesitobuga/32383363691.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69fd9e8f-91e1-48d0-a042-75696f700bbb/68279455136.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/364aa0be-c632-460d-b201-69a9b36442b1/xekidekujuzolomave.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/rufojedal.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/what_is_the_summary_of_dantes_peak.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/volitional_form_of_suteru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f73a7bf-2049-41b7-b92b-821afdfa11eb/peak_digital_wireless_backup_camera_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdb2457f-f281-4ed3-99aa-0dbddede1453/wolf_handbook.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/uspstf_lipid_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0940d7bd-1f48-4c7a-8aa8-00a585db8e39/11831739981.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_off0000f1e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E5 5532 bytes
SHA-256: 77f4ed3f8d75370ba3d7aab6258738aae95d534bf028f7c70d1a1d7028d5e6c4
font_01_sfnt_off000104ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104AD 10776 bytes
SHA-256: 1208c82f6ed3ed8038049d770acee0f9d25595405360fb8c3d6ae5e7f7f29956

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