Malicious PDF — malware analysis report

Static analysis result for SHA-256 01c47b5a8de64480…

MALICIOUS

PDF

82.6 KB Created: 2021-03-28 18:25:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 15024574fb3761a63d09762935a2989b SHA-1: f5e1bec50948b2e19072f0d22b55ba144cbf92cf SHA-256: 01c47b5a8de64480bf55191cb82b9f4289dbd5968cb3faa8d8df379ba64b37ed
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains or link farms, suggesting an attempt to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a strategy to obscure malicious links within a large number of seemingly unrelated documents hosted on various platforms. No scripts were extracted, but the presence of numerous external URIs suggests the primary function is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://soxebez.ru/wix?keyword=dark+places+pdf+vk PDF link annotation
    • http://werenntaq.online/walmart_grocery_app_slow7c6hq.pdfIn PDF document text
    • https://kisofoga.weebly.com/uploads/1/3/1/3/131383553/zipenofasi.pdfIn PDF document text
    • https://tizevilujiv.weebly.com/uploads/1/3/1/4/131406709/575a231d0.pdfIn PDF document text
    • https://cdn.sqhk.co/sadebupunen/ibTJxSQ/snes_controller_buttons_not_working.pdfIn PDF document text
    • http://duvejajenivogik.getenjoyment.net/xirodajasidimozibu.pdfIn PDF document text
    • https://cdn.sqhk.co/dasadogiso/jhfgfhe/drawing_board_game_cards_printable.pdfIn PDF document text
    • https://cdn.sqhk.co/zolulesar/1icjdig/digimon_xros_wars_cap_2.pdfIn PDF document text
    • http://naxajogilelog.medianewsonline.com/toyota_camry_se_2019_price.pdfIn PDF document text
    • https://pememeva.weebly.com/uploads/1/3/0/8/130874233/vufixonif_nijuloxid_soxuzepozak_liponekadox.pdfIn PDF document text
    • http://nigasheff.xyz/915489787053oesx.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://e824aeac-d22a-4b45-bb3c-17051d6ee04f.filesusr.com/ugd/de60da_275bae6356d941838424a55a0868341c.pdf?index=trueIn PDF document text
    • https://84daacc9-7e90-4c5d-b1ed-526950900c49.filesusr.com/ugd/73f3b0_033be3ab8a804af58d040e30bc9b78b6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/54ad425b-9324-45b9-b728-a2c652633c26/65029981891.pdfIn PDF document text
    • https://07f52280-50dc-49c2-beec-a2e30bf849d0.filesusr.com/ugd/7b8f90_b492b15308b54b4cbca01eb5f7c919fd.pdf?index=trueIn PDF document text
    • http://gagolabirej.atwebpages.com/free_download_oxford_dictionary_english_to_urdu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5522971-63f9-41ec-88d0-06dc9afba06d/winalepetubim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e34de950-c95b-421f-a95a-331425811ea7/what_is_the_witches_curse_in_macbeth.pdfIn PDF document text
    • https://0dea665b-aaaa-42f3-a52c-f86f0fd1efa2.filesusr.com/ugd/8b9728_723bbc58035e48008ed93c44188af665.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/305c415c-66b4-4dc2-b577-5d0e38153837/salalasow.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE534 4796 bytes
SHA-256: fe50f8b6c5438a49d9d09c3988cc5abda707b7c73153cb3295a8acb042d36e7c
font_01_sfnt_off0000f60e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60E 4716 bytes
SHA-256: f1dbd7bc580faf99155f0e21910b9e3978729af6cc69d955cc1e8f5512650d20
font_02_sfnt_off0001062e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062E 12484 bytes
SHA-256: 1cf9f64791a7e53b3e391d9ed48de6f76fd8adf4f24421222cc226a58fa9a402
font_03_sfnt_off00012e90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E90 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c