Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0d13b8369f3e345…

MALICIOUS

PDF

131.0 KB Created: 2021-03-31 14:48:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8eef0999c10adde6f2459ac37adc1e6f SHA-1: 83e7b3137b2349159e76ccc2250d338d18804b17 SHA-256: e0d13b8369f3e345d44fb8c5a0d699adb3d2d6781689dd6c006d15d84c655813
134 Risk Score

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. It uses an urgency-based lure. 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 0.9997

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://druttle.ru/123?utm_term=briscola+app+android PDF link annotation
    • http://zikewexer.scienceontheweb.net/97177409876.pdfIn PDF document text
    • https://bixagitiwor.weebly.com/uploads/1/3/4/6/134618264/kebiro_susolipo_difozegivofimu_vovakupizov.pdfIn PDF document text
    • http://wutugidejavazu.scienceontheweb.net/bsc_mathematics_books_free_download.pdfIn PDF document text
    • http://pibarulajido.getenjoyment.net/automata_theory_nptel.pdfIn PDF document text
    • http://sutarakikim.scienceontheweb.net/19315307318.pdfIn PDF document text
    • https://rizogogitire.weebly.com/uploads/1/3/5/3/135323834/4875235.pdfIn PDF document text
    • https://vidujari.weebly.com/uploads/1/3/4/8/134858315/gafab_bisiboriwi.pdfIn PDF document text
    • http://mogisut.medianewsonline.com/4913038151.pdfIn PDF document text
    • http://mavitrade.com/jarobekadavotd7.pdfIn PDF document text
    • http://gonifarej.mywebcommunity.org/perspectives_academic_reading_skills_and_practice.pdfIn PDF document text
    • http://nakidki-alkantara.xyz/gigepumogidesituxcxkk.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://bazunujovi.scienceontheweb.net/bcom_1st_year_english_book_download.pdfIn PDF document text
    • http://momentshop.space/goporujadtoay3.pdfIn PDF document text
    • https://mitenipup.weebly.com/uploads/1/3/4/3/134363071/takom.pdfIn PDF document text
    • http://sejerodetupumil.medianewsonline.com/how_do_you_unlock_the_advantium_120_control_panel.pdfIn PDF document text
    • http://sesizuxewewax.mygamesonline.org/aneurisma_de_aorta_descendente.pdfIn PDF document text
    • http://boldly-grow.com/41599108971knxid.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/wowonesoribu/gutizenobibebe.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/kenmore_elite_electric_range_model_790_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/dhhs_guidelines_hiv_2018.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C728 5116 bytes
SHA-256: 3de70d694e34759226b124379139a403f8dcb28e6686aa39b2cf57857d5ac54b
font_01_sfnt_off0001d89d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D89D 11312 bytes
SHA-256: 0ace251e855aa97ce49fc6f1e414871db3663334b52dd78cd3d9667f0cd14b89

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