Malicious PDF — malware analysis report

Static analysis result for SHA-256 0775023ccef5713c…

MALICIOUS

PDF

122.2 KB Created: 2021-02-27 09:35:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 88c251fa13aad54a45996c4a6dadd620 SHA-1: c2e3e130f8be7d380d43eacf9d18c934987cbb6a SHA-256: 0775023ccef5713c022f5d9c6473f4a456245bfd1826232ad299e9a1a85a2255
246 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic. The 'SE_BRAND_CREDENTIAL_PHISH' heuristic indicates an attempt to impersonate a brand, likely Walmart, to trick users into clicking malicious links. The ML classifier and ClamAV detection further support the malicious nature of this PDF, which likely serves as a lure to download further payloads or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 7

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://kemebawe.weebly.com/uploads/1/3/5/3/135313751/7680919.pdf.
  • 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://bologen.ru/strik?utm_term=kant+critique+of+practical+reason+cambridge PDF link annotation
    • https://cdn.sqhk.co/kisetofekuzi/ibchfhd/strategic_plan_example_powerpoint.pdfIn PDF document text
    • http://shopmzm.site/690737076786za23.pdfIn PDF document text
    • https://kemebawe.weebly.com/uploads/1/3/5/3/135313751/7680919.pdfIn PDF document text
    • https://cdn.sqhk.co/litawoxelida/iapbiFo/candy_riddles_match_3_puzzle.pdfIn PDF document text
    • https://cdn.sqhk.co/budajawisore/ibha9gf/ps4_emulator_download_for_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418991/normal_601feac78aca9.pdfIn PDF document text
    • https://cdn.sqhk.co/joxesinejag/jhghbje/5748322213.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375705/normal_5ff554df2e5b4.pdfIn PDF document text
    • https://cdn.sqhk.co/vutowogipu/eoaPCMj/18982904066.pdfIn PDF document text
    • https://cdn.sqhk.co/wesuwajil/glgi4AB/mobile_facilities_application.pdfIn PDF document text
    • https://kabuxezalexafa.weebly.com/uploads/1/3/0/8/130814122/somurupu-sasajotogimib-buzevoxojotodoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tinatuvarisofat.epizy.com/gifu_hashima_japan_guide.pdfIn PDF document text
    • http://bajokekez.epizy.com/edit_into_word_document.pdfIn PDF document text
    • http://nabunuwo.epizy.com/first_birthday_invitation_templates_online.pdfIn PDF document text
    • http://vorofij.epizy.com/fuxevatuzase.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_off0001a4e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A4E4 5712 bytes
SHA-256: f873847fa308ea9c174c5011b498d22f74b248b2ea8ab78f8fb675eeec685fed
font_01_sfnt_off0001b837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B837 10284 bytes
SHA-256: 086e55b1d32c2cfc66a87e26bf4a389c90deb0db77d8103b56c1a48cec38416f

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