Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6a31731897060c4…

MALICIOUS

PDF

65.6 KB Created: 2020-12-31 21:31:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 96c225a851af71e7920405107a374c61 SHA-1: b9b05a0f5e16ee2dfeadeebf1e1acaa99c486bd0 SHA-256: b6a31731897060c49ab5959054e03190bd5b2a2359df0286c901855a93c04cb1
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document exhibits characteristics of a phishing or scam campaign, indicated by the presence of numerous external links, many of which are part of an SEO link farm. The primary malicious URL identified is 'https://trafftec.ru/strik?utm_term=photo+video+maker+with+song+app+download+uptodown', which appears to be a redirector for a free download lure. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9729

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 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://trafftec.ru/strik?utm_term=photo+video+maker+with+song+app+download+uptodown PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4422136/normal_5fa4459e82934.pdfIn PDF document text
    • https://cdn.sqhk.co/vapezuwe/jggpWhh/xatumatusaxadizup.pdfIn PDF document text
    • https://lijemokuw.weebly.com/uploads/1/3/4/8/134853622/8945906.pdfIn PDF document text
    • https://bofejaximolapob.weebly.com/uploads/1/3/4/7/134751884/a0ea3ab9a8c68a.pdfIn PDF document text
    • https://rowopubogapog.weebly.com/uploads/1/3/4/2/134234702/vawisedovogiv_refasofad_butosapukodu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5fb2b9df1d4ef.pdfIn PDF document text
    • https://terowibew.weebly.com/uploads/1/3/4/3/134370771/vizemekivaf.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/woxewiwupir/boohoo_size_guide_shorts.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/chemistry_2011_series.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/xaxijomawunimukizu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/539fb4e1-01e1-4055-abe6-7fefe62af805/49766224906.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/effects_of_alcohol_on_academic_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/vuwalepupaxezuwitek.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/centroids_statics.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/cantar_a_beleza_da_vida_partitura.pdfIn 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000daa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA1 5592 bytes
SHA-256: 6b061236cd76111d4b0180440c75d9282e3ca00f8d5eedd1420c9bb3e09173ef

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