Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8c4147e77237800…

MALICIOUS

PDF

71.2 KB Created: 2021-03-16 03:45:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 28bfd22e85f6df041ba5d7b89b766d40 SHA-1: c5d158ccc444296dba02673879388cec13a190af SHA-256: c8c4147e772378007c7dc8eacf80ff10036d170365ac013156a75f3a29224aad
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 0.9998

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://golowaki.ru/wix?keyword=3+blind+mice+lyrics PDF link annotation
    • https://zanewodibamejat.weebly.com/uploads/1/3/0/9/130969445/xawajezar_putip_xozinewog.pdfIn PDF document text
    • https://kadibunafi.weebly.com/uploads/1/3/0/9/130969561/vamupoga.pdfIn PDF document text
    • https://cdn.sqhk.co/fenazijeguk/bhd2hbG/16175685438.pdfIn PDF document text
    • https://vejarava.weebly.com/uploads/1/3/1/0/131070596/943f852349395c0.pdfIn PDF document text
    • https://firudofomupavu.weebly.com/uploads/1/3/1/3/131384713/tigub.pdfIn PDF document text
    • https://bavipakodotem.weebly.com/uploads/1/3/5/9/135958795/bunakiwavux_zofisatek.pdfIn PDF document text
    • https://cdn.sqhk.co/nizekidido/hfhhWje/wavapovovekevomebon.pdfIn PDF document text
    • https://cdn.sqhk.co/luwagoma/igaAuie/noxazulujuwitoruw.pdfIn PDF document text
    • https://wutaleba.weebly.com/uploads/1/3/5/3/135390467/mizegigikidi-tukebitifuvuf-nunarevawuwaka.pdfIn PDF document text
    • https://gawopina.weebly.com/uploads/1/3/2/8/132814119/kuluvalatewalaji.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/jfUgjeN/road_sign_no_right_turn.pdfIn PDF document text
    • https://welaxulisura.weebly.com/uploads/1/3/4/0/134042468/0c00dc9291.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f19c1fa-5dbf-48cc-b6fb-a8cee8126d5b/zelulukodu.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/72497934926.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/12253576048.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/lysogenic_infections_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/lazesej/gerexotamefolemisapobo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/001067ca-36fe-4b77-920e-983cb54be712/city_of_thieves_chapter_19_summary.pdfIn PDF document text
    • https://71e5fc8e-cc9a-4633-96c3-2c70acd464d0.filesusr.com/ugd/f08e01_048547dc460d493788ec76873d7e10e4.pdf?index=trueIn PDF document text
    • https://41fe7446-7195-45c8-906d-de5e784989f9.filesusr.com/ugd/e02969_de8980cf95484b72a291447726839fe4.pdf?index=trueIn 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_off0000d83a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD83A 5188 bytes
SHA-256: 7e0072a807c8369e3798a83ff9c7830a8ae29feadbf93dc06fec8be6efdfbbd6
font_01_sfnt_off0000e9c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C6 11240 bytes
SHA-256: a3b0c3ed7e7d030dfe65c82b86fdd220376af681f7664995fb03393e2089d54e

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