Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d18eb5d04df7120…

MALICIOUS

PDF

83.6 KB Created: 2021-03-28 22:26:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 94530240c9eb2a01be930adc7c4bf75f SHA-1: d4f93d965a1b0fe610af8d1398bb7d4c80c624b7 SHA-256: 2d18eb5d04df71207d97a4930f0f320c7a766bc2194507e0095826e4f45f74ee
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to SEO redirectors and link farms, indicating a phishing or malware distribution scheme. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_UTM_REDIRECTOR_LINK' strongly suggest this malicious intent. The primary malicious URL identified is https://botokaw.ru/wix?keyword=wotlk+combat+rogue+pvp+guide, which is likely used to host malicious content or redirect to a phishing page. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely involving social engineering to trick users into clicking the link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/wix?keyword=wotlk+combat+rogue+pvp+guide PDF link annotation
    • https://xijukuto.weebly.com/uploads/1/3/4/3/134354051/3838250.pdfIn PDF document text
    • https://jamojibo.weebly.com/uploads/1/3/5/3/135349767/xibarako_teraxefekarew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476780/normal_6012d5991f10b.pdfIn PDF document text
    • https://cdn.sqhk.co/tawakejolap/ieWjbIV/96689252783.pdfIn PDF document text
    • https://cdn.sqhk.co/mamidusidozu/OVPRjdg/rarawotavot.pdfIn PDF document text
    • https://cdn.sqhk.co/nezerozara/hjiDJjg/dalaran_status_report_wow_classic.pdfIn PDF document text
    • https://megelegekirir.weebly.com/uploads/1/3/4/4/134464092/8f843.pdfIn PDF document text
    • https://cdn.sqhk.co/tudifemumopi/IfjcThe/citizenship_application_form_uk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380379/normal_6015dc7e49d48.pdfIn PDF document text
    • https://cdn.sqhk.co/bebomopakax/STvogjf/75420308201.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417526/normal_604680fb4a3a4.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/tujeviwakirawu/aplasia_cutis_congenita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8c6d1a0-2c7f-4e8f-90b6-ead1f51720be/bigubasapoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a623f94b-40c2-4e91-8efa-6f18e192f397/magic_chef_wall_oven_repair.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94ce7dfc-bd48-44a2-aa9b-8061a4cabb8a/what_is_the_domain_of_an_inverse_function.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/best_crib_sheets_for_daycare.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/pozovukufibo.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/rozadexone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2151750e-fa09-4c0d-ad89-56f1be0b3a27/31722966784.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/suxuvo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3db3d94-eab1-4a64-9325-1cee20ab71ba/epson_wf-3640_error_message_0x97.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_off000104f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F6 5492 bytes
SHA-256: 506e2715a1bdeb2cb959ff835b3369e52338be414b40a55840d30e6c350f86b5
font_01_sfnt_off0001179c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1179C 12032 bytes
SHA-256: 54a9ecf8390e1a0f8d2c7340ee23462c788d606968d2394c5a2ba54a54dbad4e