Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ea66e78e2cd98c6…

MALICIOUS

PDF

79.8 KB Created: 2021-03-14 11:27:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 280f7901eca4122373cf061ab79dc273 SHA-1: 5a066945f4655062bd8fd40083765958d3429ba6 SHA-256: 5ea66e78e2cd98c6b06b4b57077f05c7f5fd65d32d07ebc1dcde991acaf936a1
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 0.9993

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://nipisod.ru/award?keyword=blaze+of+glory+line+dance+pdf PDF link annotation
    • https://laguvibokabab.weebly.com/uploads/1/3/4/3/134383318/tujodoz_gebetubazejab_wofavanudafal.pdfIn PDF document text
    • https://kobawepa.weebly.com/uploads/1/3/1/0/131070010/3792113.pdfIn PDF document text
    • https://xevibobi.weebly.com/uploads/1/3/4/6/134683071/01c6b.pdfIn PDF document text
    • https://tizevilujiv.weebly.com/uploads/1/3/1/4/131406709/bidalutidapa-fakipixivos-nesive.pdfIn PDF document text
    • https://kovunigok.weebly.com/uploads/1/3/5/3/135317038/movedasi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fac30f9c-1bc3-4ff6-ac40-7ced1d2a170b.filesusr.com/ugd/3b7182_0567bc53a2aa46bbb3286d8859625754.pdf?index=trueIn PDF document text
    • https://e5b7f393-9b83-42c5-a877-5b85c0c772c8.filesusr.com/ugd/77b42d_82185485f63845ffaab7096c3da9012b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/acd276a0-32e0-4976-bb4a-b3a9180a70c7/life_without_education_paragraph.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab213803-6a6d-4d17-873c-61f2731e9a66/fidivawawa.pdfIn PDF document text
    • https://2a4b29e6-a790-453e-81e7-e8b9caf2c27b.filesusr.com/ugd/bf0735_649cac0904234bd696866cddfa2d3e4a.pdf?index=trueIn PDF document text
    • https://6eed613e-cbae-405e-b458-9655ef9033f8.filesusr.com/ugd/e4f6f0_9fe264ccc09f48db83d021fa5c93f9a6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfdd8ab0-656c-44d7-80d8-8d8370370af7/how_to_program_my_dish_remote_to_my_soundbar.pdfIn PDF document text
    • https://fec450ea-b80f-4746-b851-35139cc02de5.filesusr.com/ugd/53a83b_246761d35d9d4d21b0fdcdd00382931a.pdf?index=trueIn PDF document text
    • https://70848fb0-0fd0-490a-9360-2ffa38fc212c.filesusr.com/ugd/08e331_2b6232d4c83b4a5686423e1874c07222.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/538703af-eeef-4f9d-a2d6-ceacdcf68341/amana_80_sse_pilot_light.pdfIn PDF document text
    • https://1f2f8e77-98df-4c5e-b88a-83bc2b612b58.filesusr.com/ugd/5c7528_1e1e5119ed6445aca23ec07e6a026e86.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/16f0abe5-396f-4293-8208-75b1fc4722bd/xexitabimikok.pdfIn PDF document text
    • https://dd39d194-9042-494f-90ab-223c96cf8da5.filesusr.com/ugd/5d3909_c7fd8a89da4b48c98243ed5a1c7464b5.pdf?index=trueIn PDF document text
    • https://8271b8e8-1520-4b18-8785-2fafc8cd33e6.filesusr.com/ugd/efc97f_f6f473942d7d43bdaea3397e0e7b5efd.pdf?index=trueIn PDF document text
    • https://083189c9-8220-4687-a375-57be19a37228.filesusr.com/ugd/909b15_f7664fd7ec534425ba8d077038307e28.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/158fc675-0d89-4cfb-ad2d-6ee0cb609a6c/5906612766.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ee258f1-a876-4581-9a9b-23e10312f293/64755410219.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4f1d5f8-e406-451a-b96c-750280ec590e/xajunepoz.pdfIn PDF document text
    • https://945b3f91-9c76-4178-be32-f0dab3cfe2c6.filesusr.com/ugd/8d5d69_f36f322fc37e409a91c89c6b9683bc93.pdf?index=trueIn 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_off0000f7c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C0 5348 bytes
SHA-256: 967594e7f1fde7217589d1198ae3a5203409227c6ff8ff775aec9179173ee918
font_01_sfnt_off00010a1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A1A 11948 bytes
SHA-256: dfb1dec024cbc655e12e7230d953b3059b37eed259b130719cca003414a39f07

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