Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c5be5b6226ae7c5…

MALICIOUS

PDF

69.8 KB Created: 2020-11-21 18:41:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ed84db97fba9adaae510ea70e1901236 SHA-1: 98586a9d84d0837ef2e885da93a10ed2418aaf72 SHA-256: 2c5be5b6226ae7c550a03084f2aa076a04aa2321b85157c4f1a19b64cd66d844
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://traffnew.ru/123?utm_term=monster+carnival+pokemon+redeem+code+2020 PDF link annotation
    • https://dudererojafa.weebly.com/uploads/1/3/4/3/134362298/pevusizewij-redabuvod-sotaxoje-narovajewodo.pdfIn PDF document text
    • https://nijubalalo.weebly.com/uploads/1/3/1/4/131453980/6279b79d18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368751/normal_5f8fcf598b648.pdfIn PDF document text
    • https://kobijetiva.weebly.com/uploads/1/3/4/3/134322382/kagukavuduzupud-vebakiwumafow-defebotovetevu-kilis.pdfIn PDF document text
    • https://rivatuvimib.weebly.com/uploads/1/3/4/4/134469475/9251331.pdfIn PDF document text
    • https://vokozigaga.weebly.com/uploads/1/3/4/3/134316184/9500703.pdfIn PDF document text
    • https://wetolobumusu.weebly.com/uploads/1/3/4/5/134579125/xesixapi.pdfIn PDF document text
    • https://zoseruvabu.weebly.com/uploads/1/3/4/4/134492528/7ec9b8.pdfIn PDF document text
    • https://vabofofed.weebly.com/uploads/1/3/4/3/134337048/wevor.pdfIn PDF document text
    • https://fanofowos.weebly.com/uploads/1/3/4/5/134576313/15ffd2a7c2.pdfIn PDF document text
    • https://webijizili.weebly.com/uploads/1/3/4/6/134609257/6f21ba6b4eadf8.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/c64d6a71-9b67-4344-b29f-1d2e8eebd978/legozilor.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/wrong_turn_7_full_movie_filmyzilla.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_off0000d2e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E3 5624 bytes
SHA-256: 5f804dbc514ac8af36e9520d92a460431c81136c5b72262c6e844512fbf42ecf
font_01_sfnt_off0000e5fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FD 10080 bytes
SHA-256: 46b5a5cf4331c02136ce8e32aabf9c2d8f1063cc508a14e2f767497fdb4e3ec5

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