Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e2a63f031c30fdc…

MALICIOUS

PDF

81.3 KB Created: 2021-04-30 03:44:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 809867585977accd7b40a1b18a398760 SHA-1: 53f50511e38141b65f5bf1ccda19e68d5f04aeb5 SHA-256: 4e2a63f031c30fdc2504bbed2cd6045ddcb609c36e49c7c5a85f4516aa6e4349
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 0.9996

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://maypoin.ru/strik?utm_term=how+much+is+a+poulan+chainsaw PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4404753/normal_5ff60e77dcd84.pdfIn PDF document text
    • https://cdn.sqhk.co/kizulajeli/Od9xify/belewinojoba.pdfIn PDF document text
    • https://pasifoberili.weebly.com/uploads/1/3/4/8/134881239/33e567f6d7bf4.pdfIn PDF document text
    • https://cdn.sqhk.co/gorokipo/oXNejgL/zujiwagomebitetuv.pdfIn PDF document text
    • http://wellwork.site/la_familia_worksheet_answersvr9ks.pdfIn PDF document text
    • http://qrastenmap.online/head_first_pmp_4th_edition_free_downloadlyb9s.pdfIn PDF document text
    • https://tilivugex.weebly.com/uploads/1/3/4/1/134108965/d0c393a9e4a.pdfIn PDF document text
    • https://nozirurabi.weebly.com/uploads/1/3/0/7/130738896/sajorolimenenolur.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409239/normal_5fe4f5f80690b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496391/normal_5fccbdd2553c6.pdfIn PDF document text
    • https://cdn.sqhk.co/livukigelo/e8J4ghF/woodworking_supply_shop_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/noluxokeruma/cjPscgi/84974150870.pdfIn PDF document text
    • http://hugertely.xyz/kawozebok23z.pdfIn PDF document text
    • https://toolsarehome.coIn 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/05265a35-248f-49ee-94bb-8a5d550e2d9d/77396812900.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9847c7e9-d604-4956-a68b-1020d46fe728/dirt_devil_power_express_bagless_upright_vacuum_ud20120.pdfIn PDF document text
    • https://9dd02728-8b0e-4c16-8a5b-31b14a6ec887.filesusr.com/ugd/d8c3ed_f6638aa99a6645cb9e542a4bf4d4c9ea.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d8659de-76b2-46bc-8689-7c3374ae1366/fipokutet.pdfIn PDF document text
    • https://0e8f88b9-656e-4b05-9cd8-8bd477f85547.filesusr.com/ugd/95b9ea_b65cb73a6da44345a71ce5d35d9dbfb1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/178ff42a-d52f-4cea-9b87-63b18c1592ee/pegidukupinizetuwixu.pdfIn PDF document text
    • https://b304dada-1952-41b2-af44-d16a3232bb3f.filesusr.com/ugd/c19c34_8c80c82335fa4f0aae62923ca5b785d8.pdf?index=trueIn PDF document text
    • https://3bdad275-8828-414d-9063-9532e035d791.filesusr.com/ugd/c67d0c_455cd609ad61452eb9b2a6824605516a.pdf?index=trueIn PDF document text
    • https://3ae4d138-4ba3-4962-98fb-1b98b40a6a82.filesusr.com/ugd/38062a_441c2937cc524b6db464cd7ce1f1a526.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_off000101fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101FA 5132 bytes
SHA-256: 574affdbbfc023ec0b84cb752272ab7b712dd6989f54888bb0e66c1d9e89849f
font_01_sfnt_off0001135b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1135B 10780 bytes
SHA-256: 0f450db4663a4a42bdb19b2bcce260bd8e1c0b731abbc38200dc798dc4ffe41b

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