Malicious PDF — malware analysis report

Static analysis result for SHA-256 32fb33afaeecef86…

MALICIOUS

PDF

83.2 KB Created: 2021-01-31 02:50:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 94c6ce9d5c8faaee2782bef83faf5f20 SHA-1: 4fe10bb20c7d6c0327440edfd18ccaef14945a0f SHA-256: 32fb33afaeecef864d55a7397fbdc8608737bff43b4b9df5f8d49cdcd267e944
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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://jottigo.ru/aws?utm_term=casio+fx-+991es+plus+manuale+italiano PDF link annotation
    • https://cdn.sqhk.co/zubavagi/jdGHjch/ninja_vs_zombies_2.pdfIn PDF document text
    • http://onlineeshop24.xyz/35335872657z1va6.pdfIn PDF document text
    • http://omshop.space/bifoginovebikamiworewbclk4.pdfIn PDF document text
    • https://cdn.sqhk.co/roretuduva/agdhcja/easypay_metrocard_account_number_location.pdfIn PDF document text
    • http://narelavupes.22web.org/time_value_of_money_practice_problems.pdfIn PDF document text
    • http://maewallace.com/relations_fer_et_ferritinetu6bo.pdfIn PDF document text
    • https://cdn.sqhk.co/lidupusumoj/YDXkHgc/slither_io_hacks.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/hahcBTJ/34936145226.pdfIn PDF document text
    • http://arm-watch3.club/vonewomuxusajoludabakaqfjp1.pdfIn PDF document text
    • http://krokoboko3.xyz/23934487316xa2po.pdfIn PDF document text
    • http://prequester.online/cambridge_english_fun_for_movers_4th_editionozr09.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/7gighFx/classic_car_auctions_in_canada.pdfIn PDF document text
    • http://edu.casio.comCASIOIn 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
    • http://sejofedavija.epizy.com/89003329809.pdfIn PDF document text
    • http://zebigibozudival.epizy.com/2014_dodge_charger_rt_awd_owners_manual.pdfIn PDF document text
    • http://xofafatererowu.rf.gd/48622426459.pdfIn PDF document text
    • http://terezeso.epizy.com/sustainability_reporting_guidelines_australia.pdfIn PDF document text
    • http://laneladokeza.rf.gd/inconel_625_sheet_ams.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8AA 2900 bytes
SHA-256: 68d094faf81d2ea9f62e68ee4e789e40b6192f27e323b9e50c58fbaa8f881837
font_01_sfnt_off0000e2ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2ED 5164 bytes
SHA-256: cf8cf14bf63d53437a63b33374e6bdfb7be07727e624d12cc14cde99ca5879c1
font_02_sfnt_off0000f47e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47E 2048 bytes
SHA-256: 5f431aec6d1177ece3d5199f160d2cbf2ed94ce991cb32da44a3699bb201986c
font_03_sfnt_off0000fd60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD60 15904 bytes
SHA-256: 76925c864a73100af82110a4dcc66dde8fa8900111499b72fae7bcfe872cb10c
font_04_sfnt_off000130a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130A7 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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