Malicious PDF — malware analysis report

Static analysis result for SHA-256 0672b20331c2f4c1…

MALICIOUS

PDF

84.7 KB Created: 2021-04-01 18:27:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1a92c8c583e07da06c0780e6998387e3 SHA-1: 5831c7ff5df6fd172a259f82e5f86407fcb981dc SHA-256: 0672b20331c2f4c158735193c9ed566a1f062ccc2457e75be344d2d6f0d612f4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://fokemale.ru/award?keyword=ansible+playbook+tutorial+pdf PDF link annotation
    • http://pakunobun.getenjoyment.net/67482190524.pdfIn PDF document text
    • http://zenaxudoriw.mypressonline.com/geometry_deductive_reasoning.pdfIn PDF document text
    • https://cdn.sqhk.co/nogorodizet/chaKhbQ/hand_simulator_survival_hacks.pdfIn PDF document text
    • https://cdn.sqhk.co/sozodumupof/t4hhEQ6/kimaxoto.pdfIn PDF document text
    • https://jofudetazowus.weebly.com/uploads/1/3/1/6/131606688/jezudejariwo.pdfIn PDF document text
    • https://dufofumiwiz.weebly.com/uploads/1/3/5/3/135309849/2144e6.pdfIn PDF document text
    • http://gisujug.mypressonline.com/lododiresavukajarinesubej.pdfIn PDF document text
    • http://xuxijosut.sportsontheweb.net/original_harry_potter_book_set_uk.pdfIn PDF document text
    • http://reveruverof.medianewsonline.com/25615606409.pdfIn PDF document text
    • https://ladolijid.weebly.com/uploads/1/3/2/8/132816107/8ce955e1c90c01.pdfIn PDF document text
    • http://pivojowemetobiv.mywebcommunity.org/makujisewulimuz.pdfIn PDF document text
    • http://weridif.medianewsonline.com/79956448098.pdfIn PDF document text
    • https://cdn.sqhk.co/xosaletozobi/bhcjgif/newijujenosivubat.pdfIn PDF document text
    • https://cdn.sqhk.co/kafekogi/iajdOha/sawuvivebotiki.pdfIn PDF document text
    • http://zevibeponakat.getenjoyment.net/11289263843.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/hcYiiie/bubble_puzzle_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d57cd10-86f3-4bed-8967-b28e460f0c42/my_element_tv_keeps_saying_no_signal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5defc2d-811d-471f-89cd-ccff601fd811/how_full_is_your_bucket_childrens_book_summary.pdfIn PDF document text
    • http://kubomefewofumim.atwebpages.com/didipolizanejadegisuzira.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fa2f826-9fbb-4400-97ee-36e2043bec46/linking_words_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcfaf709-4477-4bda-b6ce-ac7362b004c0/76195332771.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0dd6c46-8d70-49eb-9cd0-506138ee1064/2135226576.pdfIn PDF document text
    • http://xadilopavut.myartsonline.com/barron_s_gre_math_workbook_2nd_edition_free_download.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_off0001094a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094A 5332 bytes
SHA-256: 4eee00b69849d49780a3b5469a480aef930cad6e22b5da2fccbb3aa8c537cf9d
font_01_sfnt_off00011b80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B80 11772 bytes
SHA-256: 0273ce4248639e0b748f09ffc67299af0419a0c7bdc28d4da7730a2fb9ec3b64

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