Malicious PDF — malware analysis report

Static analysis result for SHA-256 adafa83b68a6130a…

MALICIOUS

PDF

101.4 KB Created: 2021-03-19 19:30:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a5347e62f6871df6dee8162671e8bddb SHA-1: 10b143531ac03d8c136ce30d7dae9914c52f8a89 SHA-256: adafa83b68a6130a2dc3c81c53c34a685ef820faf7ffcc2d691ae567e36130da
246 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. It uses brand-impersonation credential phishing. 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 0.9986

Heuristics 7

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://xuwudivalef.weebly.com/uploads/1/3/4/8/134889087/dosibibetidedusu.pdf.
  • 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://xajibur.ru/123?utm_term=shopify+change+currency+format PDF link annotation
    • https://xuwudivalef.weebly.com/uploads/1/3/4/8/134889087/dosibibetidedusu.pdfIn PDF document text
    • https://lijepaxo.weebly.com/uploads/1/3/5/3/135324298/5433403.pdfIn PDF document text
    • https://novenoberube.weebly.com/uploads/1/3/0/7/130776641/1852756.pdfIn PDF document text
    • https://ruwatija.weebly.com/uploads/1/3/4/8/134846771/lujuzasafefep.pdfIn PDF document text
    • http://kutejovanog.getenjoyment.net/metodologia_de_la_investigacion_cesar_augusto_bernal_torres.pdfIn PDF document text
    • https://borubuzas.weebly.com/uploads/1/3/4/0/134042729/nalipowajewigex.pdfIn PDF document text
    • https://wixotavu.weebly.com/uploads/1/3/4/7/134764887/fixisej.pdfIn PDF document text
    • https://wabexerimib.weebly.com/uploads/1/3/0/7/130739061/6433314.pdfIn PDF document text
    • https://sadusanolomu.weebly.com/uploads/1/3/4/6/134646393/6253546.pdfIn PDF document text
    • https://dufubixapitosig.weebly.com/uploads/1/3/4/5/134503348/26994f91905.pdfIn PDF document text
    • https://nujirami.weebly.com/uploads/1/3/1/3/131384028/leludep_tufafot_lemumo_gadowu.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
    • http://josuxak.atwebpages.com/computer_for_rrb_je.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8aa8e5b0-25d4-4f68-bdb9-1acf9264f180/23552134188.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e11085b4-d468-4d81-a9a3-0765dc307d74/zuxov.pdfIn PDF document text
    • https://c36efdde-2309-4ce2-a10d-b6df2ce12cd8.filesusr.com/ugd/e98059_1d13920574f941b386e9f5c03424d0b9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7bc3ae0-f083-4b2a-9990-8b38eaff299c/curso_online_gratuito_de_marketing_digital_de_google.pdfIn PDF document text
    • http://naranosufok.atwebpages.com/klasifikasi_caulerpa_racemosa.pdfIn PDF document text
    • https://02408c19-b9f6-4996-a596-1d5b7e46c8d3.filesusr.com/ugd/c83fdb_4a16e9efeb5b4e15bcc6fe524ea4e448.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/664d9dbc-cb84-461a-a801-f4b5d3f8e9fa/chamberlain_universal_garage_door_wireless_keypad.pdfIn PDF document text
    • https://bf23b77b-49a9-4bef-a898-a03cfb94aefa.filesusr.com/ugd/134172_1657a40f2e7847769305643efb3e3b5c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb5dece9-e107-4898-839c-fbcf15c47002/juwokarajomutikazet.pdfIn PDF document text
    • https://21e323bd-7fdd-46e9-a6c7-4880e76d7610.filesusr.com/ugd/0a51c1_952a75ce8fc64dbe8dcf69557f2d63e0.pdf?index=trueIn PDF document text
    • https://7404da97-7fcf-4d5f-9d5f-3f8644e6773a.filesusr.com/ugd/35f767_e6926995738740f2a0bc67d1ea4ed5e5.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013f2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F2D 5308 bytes
SHA-256: 4be0d4b72dedc1f22eaa76da89bd913450957ce34fad05d579b3b2f971cfaee4
font_01_sfnt_off0001510d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1510D 11464 bytes
SHA-256: 249d3f0bbe8599ccec724ac8b18ad19f99259493b086848b7541ba2a9066b80d
font_02_sfnt_off0001780d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1780D 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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