Malicious PDF — malware analysis report

Static analysis result for SHA-256 78406d1c6651e93c…

MALICIOUS

PDF

75.9 KB Created: 2021-03-13 20:36:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 984afc5addd8add86a90f440627a3b29 SHA-1: 98fda5e633929583d746c3b02e8e450ae0301dec SHA-256: 78406d1c6651e93c781b3d1c85e89c8f60ec498b2637f2399f66ae660e57901b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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://midufefew.ru/strik?utm_term=pdf+architect+2+activation+key+crack PDF link annotation
    • http://upsbox.ru/43090576232bwlab.pdfIn PDF document text
    • https://zuzolavilasobin.weebly.com/uploads/1/3/4/5/134523903/c0a5c944.pdfIn PDF document text
    • http://nujagexurej.medianewsonline.com/nora_roberts_book_2021.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374976/normal_6010f93132a7a.pdfIn PDF document text
    • http://simopuvoramawu.mywebcommunity.org/zebra_gk420d_printer_manual.pdfIn PDF document text
    • https://nakuzimatixibo.weebly.com/uploads/1/3/5/3/135388853/d461ec058e831.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374360/normal_5fcd6db02dc35.pdfIn PDF document text
    • https://perixezekawuxod.weebly.com/uploads/1/3/4/5/134504143/8e1701.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410415/normal_60023bd77f443.pdfIn PDF document text
    • http://magazinrf.xyz/79929566770gyg8k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421629/normal_603fe6624aa32.pdfIn PDF document text
    • http://fajasated.mywebcommunity.org/are_cats_more_intelligent_than_dogs_reddit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kimawawasero.onlinewebshop.net/rawuvebopudegetevowu.pdfIn PDF document text
    • http://namepafubi.atwebpages.com/winojarufiseno.pdfIn PDF document text
    • http://wilosokanik.myartsonline.com/catholic_social_teaching_human_dignity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51bb5782-1a1c-4208-b86b-0824b85bdcf9/92265888604.pdfIn PDF document text
    • http://dapekafuxururo.myartsonline.com/5812185976.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99ffe61f-1f14-4bbc-a9d6-74afc34cffa2/why_isnt_my_whirlpool_refrigerator_cooling.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_off0000e996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE996 5260 bytes
SHA-256: 65276f84e9fd36e9a1e3d766b748ea1ada907df19374f09b7df1fc6a24bd4afd
font_01_sfnt_off0000fb85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB85 10988 bytes
SHA-256: e4cf0d61aadd6604f1196468d7bbe9aa69355371614f32a8ebde094dc4baebc1

Open this report in the interactive analyzer, or submit your own file for analysis.