Malicious PDF — malware analysis report

Static analysis result for SHA-256 2edee1db43c9afba…

MALICIOUS

PDF

78.1 KB Created: 2021-04-05 08:20:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9a970efbbdd836a402b915efa744974d SHA-1: b07572f2ad566e5fbf6fede489ce1417a4629005 SHA-256: 2edee1db43c9afbae8778ee7de0ee6ea1d17a221f207c14581a0f648c95e2eec
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 0.9992

Heuristics 6

  • 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.
  • 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://lozipotod.ru/strik?utm_term=the+essential+theatre+11th+edition+free+pdf PDF link annotation
    • https://danexuxubusam.weebly.com/uploads/1/3/2/6/132695747/153c3a8f.pdfIn PDF document text
    • http://justamorem.com/can_you_ever_enter_gerudo_town_as_a_manc7x68.pdfIn PDF document text
    • https://xabodalemebom.weebly.com/uploads/1/3/1/3/131381489/fivefoxuvavow.pdfIn PDF document text
    • http://am-sound.ru/61607525490yd4wy.pdfIn PDF document text
    • https://pelimabogex.weebly.com/uploads/1/3/4/6/134685965/fdec6110a7974.pdfIn PDF document text
    • https://ketuvukelese.weebly.com/uploads/1/3/4/3/134351906/7672929.pdfIn PDF document text
    • http://salleop.xyz/57463022884k4y0d.pdfIn PDF document text
    • https://lareduna.weebly.com/uploads/1/3/1/4/131453109/5009642.pdfIn PDF document text
    • http://stnold.com/craftsman_12_gallon_shop_vac_with_detachable_blowerh7i55.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/71d09a72-597c-416e-b81e-fc275e582e42/sunbeam_electric_blanket_controller_nz.pdfIn PDF document text
    • https://e809654a-a95b-4dbc-a338-24085255a2f8.filesusr.com/ugd/1b6cec_a613499a17334fb29d7be97eb6bd9e65.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/adb1e336-7154-42ec-8ccf-aba9f2d522fd/programmable_logic_controllers_5th_edition_petruzella_solutions_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77a3c7f8-e890-4193-b23b-2b094abdeb58/my_pool_heater_smells_like_gas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc0f3ceb-b95d-4cea-ba8e-a7986831c1ab/vadajufeja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48717c51-f64a-4ce4-8095-04ffb277251b/7601895506.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/xoduwesogob.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/brass_quartet_sheet_music.pdfIn PDF document text
    • https://be9c8297-50e9-4ec8-be22-7cc4068ef96a.filesusr.com/ugd/fc3b0b_62a2c3448c4f4cabb19cffeb67e105e1.pdf?index=trueIn PDF document text
    • https://7162f0c1-3bb2-4775-9ad2-1e34613fb889.filesusr.com/ugd/595093_cbcf6274784748b2a021fc17089f6816.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/android_9_vs_8.pdfIn PDF document text
    • https://82e7f058-9c2a-4352-8e65-a162d98cde11.filesusr.com/ugd/ba3c76_fabb4fb4883147238f1344ad9ff7ea22.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/badminton_rule_book_2018.pdfIn PDF document text
    • https://436010f1-0dd7-4950-aec0-3bdf337573e8.filesusr.com/ugd/5a4c69_1bd3b9fd5ce341f98792f3d0c013d59b.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_off0000e66c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE66C 4916 bytes
SHA-256: 1605a9afcbb3d4629ac2f0f280ebb3944497645b21e923d68525a74508e0e40a
font_01_sfnt_off0000f717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF717 11008 bytes
SHA-256: cb93bebd6ce07c57982ba217f1185ce639c28b104285a62aeb6cd99d1fa36903
font_02_sfnt_off00011c9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C9A 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2