Malicious PDF — malware analysis report

Static analysis result for SHA-256 90f5358147b27d48…

MALICIOUS

PDF

80.2 KB Created: 2021-06-13 18:52:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a91af6438be1202266df6ad561e65b57 SHA-1: 05b42465a862f372c68a0aa2ecb313a93ad7b281 SHA-256: 90f5358147b27d4812aea3ce954e23197cea73fc5ac423229e7c5cfc045252b5
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating it's a phishing attempt. The document body, though partially garbled, contains text related to a song video search, likely a lure to disguise the malicious intent. The primary IOC is a URL pointing to a suspicious domain, which is likely used to host or redirect to a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xajibur.ru/123?utm_term=dont+say+alvida+song+video PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382430/normal_6013e7ba32f2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449768/normal_604fd44be2870.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4368249/normal_60b3b365a30e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366406/normal_5fe10be7acddd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420589/normal_5fedbdeab0e44.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428335/normal_60037bdead2c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413467/normal_603e7439c6a63.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://lufokomarib.pbworks.com/w/file/fetch/144800052/can_i_lose_my_house_in_a_civil_lawsuit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ceb1c66d-fffb-4715-81fd-39225fd648ee/sony_str_dg720_specs.pdfIn PDF document text
    • http://visetululiv.pbworks.com/w/file/fetch/144705816/ps_cc_for_android_10_apk.pdfIn PDF document text
    • http://womelilare.pbworks.com/f/marjaavaan_movie_download_utorrent.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffcd1ad9-2eba-42d6-a199-97cf38168f5d/zegaxenaxosonepogijawot.pdfIn PDF document text
    • http://vatojorisa.pbworks.com/f/dafebizolonojonif.pdfIn PDF document text
    • http://kunixove.pbworks.com/f/daximozebafirefefaresuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04b75323-db9a-454c-b823-9785b93dbf90/tipegokisire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abdc36c0-8fc0-44d2-8ddb-ab65dfbbfc61/how_to_use_razor_power_core_90.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d464b565-7f69-49b8-924d-85bd44fca78c/fugisobilukujov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/384a6c30-5940-4b28-b011-5f3ce540a76b/what_does_the_word_guarantee_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/424c295f-d525-4438-a008-2fbfa31ad6cf/12837322118.pdfIn PDF document text
    • http://nigezid.pbworks.com/f/distinguish_between_the_direct_and_indirect_band_gap_semiconductors_with_examples.pdfIn PDF document text
    • http://funuvutidip.pbworks.com/w/file/fetch/144461487/fuwujifatoranugod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04521b32-bc20-43b0-9e9e-cac746647167/where_is_the_washing_machine_pump_located.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/291a7785-6281-42d9-8406-679e4f20df3a/fozovipowimuwekobufup.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_off0000e1e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E9 5056 bytes
SHA-256: 1f67ac38121fae8dc8add6b31760811af5e79604848de3963f1ab93b9233a20e
font_01_sfnt_off0000f345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF345 10964 bytes
SHA-256: 80d2533e4ae8197957eddb30137c821efb8302a67b4f280ff9747498fe4e357c
font_02_sfnt_off000118f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F3 8148 bytes
SHA-256: 83c5cc67008c99181a73baf8e97c3baf0c27d603e9b670d8f704ba5c0e59fe72