Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae971c6d1fb3eb44…

MALICIOUS

PDF

66.1 KB Created: 2020-12-24 18:46:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1b00b8f1ff8166ff3cbdc16ad49df26a SHA-1: 8aa40cbbe61c2a75567762bd39270bc8a8fa74be SHA-256: ae971c6d1fb3eb44c69e7e7d8aaf199d0709423a43b41bfc8720e5c17bd65b13
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 0.8307

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://traffking.ru/wb?keyword=freeciv%20portable%20download PDF link annotation
    • https://tijujuvuxerupuz.weebly.com/uploads/1/3/4/2/134236121/77392e246d0ee.pdfIn PDF document text
    • https://dududisekit.weebly.com/uploads/1/3/4/3/134348084/36a96b88.pdfIn PDF document text
    • https://gifetapajuloper.weebly.com/uploads/1/3/4/6/134682222/1432507.pdfIn PDF document text
    • https://lopuxewununoj.weebly.com/uploads/1/3/4/7/134748711/rifumofujejov_raporedifimu.pdfIn PDF document text
    • https://jibowosiz.weebly.com/uploads/1/3/4/6/134632869/8647113.pdfIn PDF document text
    • https://cdn.sqhk.co/gatutojuse/rYjdgix/megan_boone_net_worth.pdfIn PDF document text
    • https://kakezilek.weebly.com/uploads/1/3/4/4/134401463/187791fbb1e9c0.pdfIn PDF document text
    • https://koligopore.weebly.com/uploads/1/3/4/6/134605833/vorupasagedo.pdfIn PDF document text
    • https://nakalefa.weebly.com/uploads/1/3/4/5/134522788/dewusotesoma.pdfIn PDF document text
    • https://xigujevaw.weebly.com/uploads/1/3/4/7/134701692/norebitewede_xonawoxeniboxex.pdfIn PDF document text
    • https://bowefolezoz.weebly.com/uploads/1/3/1/4/131407704/49dad8f2a50c933.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/farezelof/bsc_industrial_chemistry_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/podofabafizawuvasapi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a2d7aa7-8c52-4eb6-8a6f-ebd141df7109/pics_100_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/2014_chevrolet_equinox_ltz_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8249f165-b902-4dfc-bd8b-ac2f5d7dc296/79078155255.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF86 5136 bytes
SHA-256: 0c0621523258615c00ffd4e3fa8bb91bc654782d18db286a231ac250f9e32e95

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