Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa861ac1462feb9a…

MALICIOUS

PDF

89.7 KB Created: 2021-03-17 10:23:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 668c73cef309ed905511b715483b29da SHA-1: 805c3a4f0d7d8e554a018551783b0f21e58c74a3 SHA-256: fa861ac1462feb9a0bb951474a7b109a628dade21a19847d698bf963b166efe6
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. The document body, though heavily obfuscated, suggests a lure related to a 'frigidaire gallery stove manual pdf'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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 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://jumiwimov.ru/wix?keyword=frigidaire+gallery+stove+manual+pdf PDF link annotation
    • https://cdn.sqhk.co/gijimexuv/iggjjsp/mozezegat.pdfIn PDF document text
    • http://wugilunage.iblogger.org/68530527867.pdfIn PDF document text
    • https://cdn.sqhk.co/mumaxeje/ajgigja/16196559043.pdfIn PDF document text
    • https://cdn.sqhk.co/nomelafu/fJgfheb/8874362947.pdfIn PDF document text
    • https://cdn.sqhk.co/xororofomed/sgcifhe/rusty_memory_survival_vip_apk.pdfIn PDF document text
    • http://fewomazojuxed.iblogger.org/23414704940.pdfIn PDF document text
    • https://cdn.sqhk.co/samekikogeri/sjjidia/bedwars_maps_download_zip.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tepuvat.epizy.com/mariage_d_amour_music_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4495270f-918b-469d-9c21-024e6cb8f28f/how_much_to_study_for_usmle_step_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad2abd27-1bce-44c7-a1ee-2bd1b6fa6256/singer_futura_xl-580_price.pdfIn PDF document text
    • http://delifas.epizy.com/63217886036.pdfIn PDF document text
    • http://semofif.epizy.com/74586454019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94ea4fb0-28a7-4d48-accc-9d260bfc99c9/dream_on_me_crib_style_628_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d210e21-7dde-47ac-89a3-cc02e6cb785a/what_does_navy_nec_stand_for.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b538eec3-8414-4129-9913-4f9f9a858330/50278749254.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c9f3ff6-cdc6-4150-a321-3636786741c6/audre_lorde_sister_outsider.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/87991832813.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55e65aa8-93da-4992-9cbc-93bd3209c099/bagob.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/what_is_news_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/650adb48-656d-4bba-9758-ce5e7ac99633/memejusifafopij.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/89396595749.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e701ef01-ab2e-445c-aa36-2847a1f2b915/stock_market_open_today_july_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b4576aa-484a-4632-b880-4ef33595b67a/do_energizer_rechargeable_batteries_work_in_solar_lights.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011c21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C21 5476 bytes
SHA-256: afa85d83810fa5e246219fb4504ff2327ebbbd3bceec89e3cebaac792e4a2829
font_01_sfnt_off00012ec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC4 12356 bytes
SHA-256: a141f0130bff8d68d6317afd629f4a839f5f5b4bc9bff99e7fa0c32ea0c26650

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