Malicious PDF — malware analysis report

Static analysis result for SHA-256 11e6489170392972…

MALICIOUS

PDF

76.4 KB Created: 2021-02-14 04:25:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 8463eb7da41915d84f0018112814a9a9 SHA-1: ba41dd87f4f3ae266877602888903357f796960f SHA-256: 11e648917039297223f2096235cfa16a1ca54c7376122eca9b1b876c57cad3da
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm for SEO purposes, pointing to a redirector URL. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic suggest an attempt to drive traffic to malicious content.

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://seumenha.ru/wix?keyword=four+directions+colors PDF link annotation
    • https://torovuzexas.weebly.com/uploads/1/3/2/7/132710592/9086857.pdfIn PDF document text
    • http://leyloften.online/zejimivajo1qg79.pdfIn PDF document text
    • https://rozogefeju.weebly.com/uploads/1/3/1/3/131398259/zizitusotidi-rudogujujujum.pdfIn PDF document text
    • https://dezijetide.weebly.com/uploads/1/3/4/8/134864221/1dbe27266620b58.pdfIn PDF document text
    • https://lelopotive.weebly.com/uploads/1/3/0/7/130738546/5503694.pdfIn PDF document text
    • http://runmasten.online/virulemovugezuselamiripikg24g7.pdfIn PDF document text
    • https://xubejuvanexog.weebly.com/uploads/1/3/5/3/135311054/df9fe1eda1.pdfIn PDF document text
    • https://fowazepare.weebly.com/uploads/1/3/1/4/131406063/xadufoj_wipam.pdfIn PDF document text
    • http://mscgis.net/onedrive_sign_in_error_0x8004deb4cmgfd.pdfIn PDF document text
    • http://xubixaxar.22web.org/zovanololonimadeke.pdfIn PDF document text
    • https://dirogine.weebly.com/uploads/1/3/0/7/130775503/627566.pdfIn PDF document text
    • https://lirejodeju.weebly.com/uploads/1/3/4/6/134628820/nijawap_galidukurug.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/pubopelej/fizuru.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/94614146797.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/zumefed.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/high_school_gangsters_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/52383734942.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF060 4676 bytes
SHA-256: 819619e8b7b31133d2a6f495425b65b081308287c58237ed8df25d968649acae
font_01_sfnt_off00010053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10053 10672 bytes
SHA-256: 70601ee57d267f9a7e8b66fe77cdb8f9aea9b38263ed7a486d683620c4e72488

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