Malicious PDF — malware analysis report

Static analysis result for SHA-256 301fd7a9dda8b68b…

MALICIOUS

PDF

80.5 KB Created: 2021-05-21 07:30:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c41be41482fff4ef7bd0efa90f322841 SHA-1: 708c73b12c49c8cba87fa063460c458d5ccbda94 SHA-256: 301fd7a9dda8b68bf6c9971c333d9405f1ff1a1355f0c069e191782d4c17a26e
186 Risk Score

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 0.9954

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/strik?utm_term=ionic+binary+compounds+single+charge+cations+worksheet+answers PDF link annotation
    • https://kajavowonedefa.weebly.com/uploads/1/3/4/8/134858644/4609498.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381528/normal_60012a7e6e5ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465559/normal_5fd5f3fc7f45c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450421/normal_603559f722349.pdfIn PDF document text
    • https://xodukibefapox.weebly.com/uploads/1/3/0/8/130873769/d1f6abfbf.pdfIn PDF document text
    • https://saxarewuvopa.weebly.com/uploads/1/3/4/8/134855039/zanuwuvatimezo.pdfIn PDF document text
    • https://gujukajiw.weebly.com/uploads/1/3/1/4/131437807/239d0406aaeb.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/3991100.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412165/normal_5fd0d3dc1f8d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476596/normal_5fe828c95fe77.pdfIn PDF document text
    • https://danifiwap.weebly.com/uploads/1/3/4/5/134585556/7281119.pdfIn PDF document text
    • https://movuwopolujot.weebly.com/uploads/1/3/4/2/134266044/lejopezusujep_xexovetogetobi_fedomijogonelur_nexan.pdfIn PDF document text
    • https://guxodobozit.weebly.com/uploads/1/3/4/3/134333536/wuwowaxaxemur.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
    • https://uploads.strikinglycdn.com/files/2c86d97c-81d0-4fff-812d-6475d6f82e2e/electricity_and_magnetism_purcell_and_morin_3rd_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8a7f82b-ae40-4aa8-873b-a073c7a9f993/scag_freedom_z_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/luropiw/dubodi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e77459d8-bad4-4b2f-bd1c-314166c70c35/how_to_get_money_on_gta_online_cheat.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/chiari_i_malformation_radiology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7af0a82-7545-4458-8a4d-10a274298dd2/simplified_numerical_analysis_1_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9cac1a9-edc3-47a3-8db7-86461702f7bc/purposes_of_law_in_south_africa.pdfIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/guwagew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7723f315-fed0-4403-808e-629d87607aff/what_is_desktop_definition_in_urdu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ec787de-a0fa-4345-b4e9-96fcfa9efcf2/nonisusijinikejixota.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/the_power_of_now_eckhart_tolle_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5190762b-372a-4dff-ad33-ed6f373c0031/37881433418.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ef1236d-647b-4137-8ea7-f8afdf6ad866/68768774140.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE70 5704 bytes
SHA-256: b73961eb3842fce91898b7e0705e20961ffbfd83aa10a4924533dbb58f703e61
font_01_sfnt_off000101ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101AB 10384 bytes
SHA-256: ead08049d3de441b558fa42e54f0217df2f43a6f17c7bdd52fe740fc25d83e7b
font_02_sfnt_off0001252d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1252D 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c