Malicious PDF — malware analysis report

Static analysis result for SHA-256 8970dec82737ec12…

MALICIOUS

PDF

37.9 KB Created: 2020-11-03 02:39:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 4e79e5b6e8127358ad3775c91cb92208 SHA-1: 22e1322dbc69b0e0ddb2a5eec097d3a4222e0e33 SHA-256: 8970dec82737ec121476f34485131c6d5962066ae7cc885a8285fd5c6a3fc303
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, suggesting a phishing or scam attempt. The embedded document body text explicitly mentions 'Consumer direct virginia form' and contains a URL pointing to a redirector, which is then followed by numerous links to PDFs hosted on weebly.com, likely part of a link farm to obscure the final malicious destination. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/aws?keyword=consumer+direct+virginia+form In PDF document text
    • https://jaxirifaru.weebly.com/uploads/1/3/4/5/134500995/numureniniju.pdfIn PDF document text
    • https://wawurekufa.weebly.com/uploads/1/3/4/3/134322490/5120917.pdfIn PDF document text
    • https://genifefesabido.weebly.com/uploads/1/3/3/9/133999330/lodulugovuxa-vebaf.pdfIn PDF document text
    • https://tenikekiso.weebly.com/uploads/1/3/0/7/130775729/larof.pdfIn PDF document text
    • https://kesafoxubifode.weebly.com/uploads/1/3/4/4/134481064/fc93b8742.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/vezosoluvezoj/roland_d110_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/el_rancho_restaurant_stockton_ca_menu.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/fukojitakanavuk.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/gavimoluwil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d483f98-8d1f-41f6-a3db-d9696fbaf83f/plant_physiology_and_development_6th_edition_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/petejasujekepara.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/20546541952.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/93567054789.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6fba5ab-9302-42b4-a448-d94a9e0be689/13910220102.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/the_value_of_philosophy_bertrand_russell_quotes.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_off00005555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5555 5276 bytes
SHA-256: 8918e1eddcff449c4398657fa3578a89ca09586b217c2cd595728356d43e49b4
font_01_sfnt_off00006730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6730 10336 bytes
SHA-256: a7268e6d703b2e64c7474efa1b4bc135678a294b39ad9f29a9e570a9d9bfe522

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