Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1ee58ef729e4178…

MALICIOUS

PDF

68.4 KB Created: 2020-10-25 13:01:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 2f1242724c00a0ab92cafaed2f07f3ea SHA-1: 2eab62bfc8ff97243f1f3d1d6bfacd29ed69b73e SHA-256: a1ee58ef729e417888e20f9e3e5d0cd7af6afa7c66a4a46c3cfdbbd4dfdb3a8f
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a significant number of embedded links, many of which point to disposable hosting services and redirector URLs. This behavior is indicative of a link farm or SEO manipulation tactic, potentially used to distribute malware or phish for credentials. The presence of a known malicious redirector URL further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/123?keyword=crestar+fan+instruction+manual In PDF document text
    • https://kasukironumasex.weebly.com/uploads/1/3/1/4/131454791/8410115.pdfIn PDF document text
    • https://jivexine.weebly.com/uploads/1/3/1/3/131380908/2246694.pdfIn PDF document text
    • https://pisanofinupu.weebly.com/uploads/1/3/1/4/131437881/jerugus.pdfIn PDF document text
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/7d08337cc74f72b.pdfIn PDF document text
    • https://fanavepuru.weebly.com/uploads/1/3/1/8/131871984/a8892a2.pdfIn PDF document text
    • https://tenagudewujuga.weebly.com/uploads/1/3/1/1/131164273/lojizakekaj_vuletobedovisi_rewezon_digeloperebegip.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/a3d7e1ca7523529.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/sigopikolobazenike.pdfIn PDF document text
    • https://gemaxudemaxepeb.weebly.com/uploads/1/3/1/0/131070646/dadoximazoxege.pdfIn PDF document text
    • https://topejaliwas.weebly.com/uploads/1/3/4/3/134305960/3620551.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/bacaan_sholat_latin.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/sijasadenerosuwodekesu.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/asurion_affidavit_sprint_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9d63659-4683-488a-95e6-04e1ba60959f/55719681008.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3baa99f-22df-4298-81a0-35f8bc4fe7d8/one_piece_unlimited_world_red_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a51fc993-ada2-462e-819f-4dbad238074b/linufapetubelunifufijeme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82c936fa-018f-47e9-a6bc-c2ff76209cc2/kajotitage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35bb0a78-8477-412b-84a2-7a0f628c156a/xadesoxonesa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60322318-36ba-4d1a-886e-fabc9db2dec7/57723318254.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d33e673f-dd52-4a60-8e7d-f10bcc378ee5/19942834420.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fddaa56-c5ca-4197-ad64-92f7a9d35197/33897054921.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67de3b9b-913d-4942-b9c3-13eb7aac379b/13997967448.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9683/4212/files/marvel_legends_price_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8289/8326/files/paragon_exfat_ntfs_usb_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6227/0365/files/levipexebaj.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c97a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC97A 4932 bytes
SHA-256: 5615d5f9b1ad83d50c42873ea0b227fc820c12592cc0bdbc09952d4f009831cc
font_01_sfnt_off0000da21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA21 11620 bytes
SHA-256: 2191976bc73e8b7b5403cc22c65518e11c561f6b98940fca9d995609c1547a2f

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