Malicious PDF — malware analysis report

Static analysis result for SHA-256 c055adac5f9ea56b…

MALICIOUS

PDF

67.7 KB Created: 2021-03-08 21:32:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: f3aff2bf7d318d294344bfea001f6d23 SHA-1: cb8f212960b7d97501901f437187f55f8ea4c7a1 SHA-256: c055adac5f9ea56b9215ec2f06530be4a030ea6f9c21e8de5ee78d10da57c7bd
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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/wix?keyword=husqvarna+mower+manual+download PDF link annotation
    • http://xuwivezotuw.22web.org/lofinover.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://letelexedat.epizy.com/9593614323.pdfIn PDF document text
    • https://5090c2af-253d-40c3-bfb7-942fc6db26b0.filesusr.com/ugd/0511f5_42bcceb2f7684bfc9ac926a634394d32.pdf?index=trueIn PDF document text
    • https://c183b790-cb34-49aa-848e-1a9f2b14dda3.filesusr.com/ugd/d8966e_a8b9150cb65d4979b2907b0b888b6c11.pdf?index=trueIn PDF document text
    • https://fb075467-9d00-46c6-93ac-2b777f5e584b.filesusr.com/ugd/8bcd66_7aa0e1981edf4e32bd288536091eccae.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaa7a69d-a6b7-4b0a-bd5a-4d6061d9b8d8/pictures_of_the_cast_of_little_house_on_the_prairie_then_and_now.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f13fd4d1-368a-4643-9d38-db366305c38e/conrad_heart_of_darkness_amazon.pdfIn PDF document text
    • https://aed022ca-8a9d-452d-9022-56a74a585a14.filesusr.com/ugd/4d548e_1f798f6547c14cd49bfc31b202955fa9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c16544de-60cf-4bf3-a5b3-e94c24e03cfd/89752825459.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e32fca5a-5815-4e31-a3e1-1709fd112436/budajukazubelobova.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4520b64f-911a-4653-a2a7-5c3b4f963b31/viropuruforideg.pdfIn PDF document text
    • http://fudowoxalukiki.rf.gd/sogitopega.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d4573dc-4090-4218-8890-a20f75a00b65/kitchenaid_superba_oven_not_working.pdfIn PDF document text
    • https://171e2b11-24ea-4535-acac-f971ec821c4b.filesusr.com/ugd/a07927_11d98fd4369a487fb25a7ca1a391d8e1.pdf?index=trueIn PDF document text
    • https://856cb5e6-6c81-45ce-9604-b57907a15cd2.filesusr.com/ugd/cc3ca9_c10d4e7369414f9bb6be6d4c36719608.pdf?index=trueIn PDF document text
    • https://413f70bc-0247-4a04-a3fc-eabb14e2b93f.filesusr.com/ugd/f18ee6_3beb9d32d0954a168eebca213e8dd904.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcec8826-feab-4679-87b4-9d7229a95d7e/82785729431.pdfIn PDF document text
    • https://e4586023-485a-43f1-9451-2d404684c5b7.filesusr.com/ugd/95ff22_b5e1c78a92e142fe802ddc43ae4b5fba.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_off0000cdb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDB7 5208 bytes
SHA-256: e28b18ad7b2e5d3f67a825ad38e37c905d813a30e872fe984d02ddd8ce66b89c
font_01_sfnt_off0000df60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF60 10028 bytes
SHA-256: 6b32bb3dd903feb8fd92b4f371c3d2ad884f20eade1274d8d355d209f75d52e7

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