Malicious PDF — malware analysis report

Static analysis result for SHA-256 480630da2b53f7e2…

MALICIOUS

PDF

119.0 KB Created: 2021-03-20 07:13:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0359f5232239b61d3857c80b8aea4d47 SHA-1: 554479aa288a8417046d5d8fd3f45a5fcc71447e SHA-256: 480630da2b53f7e2001572a536fec0455b2d61b8799fec6462175634d1f0afa4
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://crophysi.ru/123?utm_term=metformin+mechanism+of+action+diabetes PDF link annotation
    • https://gabonavokelog.weebly.com/uploads/1/3/4/6/134684269/serezadewonulak.pdfIn PDF document text
    • http://fovajifep.iblogger.org/metformin_associated_lactic_acidosis_treatment.pdfIn PDF document text
    • https://kufudazasa.weebly.com/uploads/1/3/4/6/134626120/1935122.pdfIn PDF document text
    • http://bozenuvobe.iblogger.org/bafijeretewijelo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454668/normal_5fd62f6355eb5.pdfIn PDF document text
    • http://reform-st.ru/levepabisapejy1lg.pdfIn PDF document text
    • http://replyua.site/dell_poweredge_r710_bios_settings_for_hyper-vztqx9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382948/normal_600ffc4506dcc.pdfIn PDF document text
    • http://zexawil.22web.org/archiware_p5_client.pdfIn PDF document text
    • https://liwetevafiwa.weebly.com/uploads/1/3/4/0/134096648/deroxi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450426/normal_5fd090e6e93ec.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/cb13e334-2c15-4611-804f-8686883a6ce5/56177660574.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3172cdcd-e226-4538-9c41-918480a3976b/fuporulatafi.pdfIn PDF document text
    • http://vojapulipono.epizy.com/mivafenorepot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b441e3f6-3126-44bd-972c-37daada1663c/examples_of_supply_chain_management_jobs.pdfIn PDF document text
    • http://ropasibemufi.epizy.com/rekopivozibivobomizo.pdfIn PDF document text
    • http://zesaxuxi.rf.gd/bypass_gastrico_tecnica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cacddbd7-8567-44da-a4d0-c567437a87bf/central_route_to_persuasion_definition_psychology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7542a481-2811-4af0-8124-8eb4cd53b4b8/spider_man_comic_cover_art.pdfIn PDF document text
    • http://bedipowatukefov.epizy.com/legends_quest_rs3_guide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18738 5160 bytes
SHA-256: 3a43d136bf6454055d046edecb74855b3aecf60c35f9929c1bfdeaba5b0d1aac
font_01_sfnt_off0001988c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1988C 11900 bytes
SHA-256: 8d4bca1553aa3564352bbf27f4a911c4ec33961da7db75184f4f9639e4fd5380
font_02_sfnt_off0001c0b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C0B5 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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