Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e6bfe74ec350ea2…

MALICIOUS

PDF

69.0 KB Created: 2020-11-11 00:49:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 9c3aa9889888bc440411cf187893c554 SHA-1: 8643a6132fa48b12672dddd71c2a9edefa97733e SHA-256: 6e6bfe74ec350ea27f149c0949c2a86e5198d731a8c3c16122b0030ccfffd15a
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to SEO-optimized PDF files, suggesting a link farm or redirector setup. One prominent URL, 'https://traffnew.ru/strik?keyword=the+children+of+willesden+lane+summary+prezi', is identified as a high-risk SEO redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

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.
  • 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
  • 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/strik?keyword=the+children+of+willesden+lane+summary+prezi PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413361/normal_5fa843f4df74e.pdfIn PDF document text
    • https://dojudiwoju.weebly.com/uploads/1/3/1/4/131406456/bupomomubul_pukuxi.pdfIn PDF document text
    • https://nimediwajukijiz.weebly.com/uploads/1/3/4/5/134501673/dadifuvifamodivo.pdfIn PDF document text
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/fogukojev_fuwex_zobafojakosidaj_kumuzesivef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384835/normal_5f9656ead8b95.pdfIn PDF document text
    • https://jizufolikoni.weebly.com/uploads/1/3/4/3/134349493/3816881.pdfIn PDF document text
    • https://vafunaparixidi.weebly.com/uploads/1/3/4/6/134627598/3243268.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403276/normal_5f92fde95c24a.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/bulolimepol/spinal_cord_trauma.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/nutrition_and_you_4th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/why_use_google_play.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/99808802411.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/dogitogoj.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/84124875014.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/roblox_free_robux_app_apk.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_off0000d137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD137 5588 bytes
SHA-256: 773c57ede07243ceba1092a07d33abe55ca7e5f4e8497f6fd77d681477a71b72
font_01_sfnt_off0000e42c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE42C 10128 bytes
SHA-256: ab45fdc5303df2a0aa2eafe21fcc0440b92d0220a5132833e3f8e358dfa78a46