Malicious PDF — malware analysis report

Static analysis result for SHA-256 2491003e790dc0e1…

MALICIOUS

PDF

77.9 KB Created: 2021-03-23 21:28:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 753f3c96e1f33afe68388a29f05ed543 SHA-1: 8b63fc3fa04671e90010ef399cb16378ccb07915 SHA-256: 2491003e790dc0e18cbff8a86967ffd5c34a0873f543791fda90cffba8dabd1b
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 0.9960

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://resalured.ru/award?keyword=social+ecological+theory+pdf PDF link annotation
    • https://bewotenugajuvu.weebly.com/uploads/1/3/2/6/132695730/4871334.pdfIn PDF document text
    • https://lepamume.weebly.com/uploads/1/3/4/8/134882258/towozamaruvederutaxu.pdfIn PDF document text
    • http://wiinorama.website/atlanta_falcons_former_playersxadsg.pdfIn PDF document text
    • https://cdn.sqhk.co/sevilebup/jeH5dhi/world_cup_qualifiers_africa_fixtures_2022_groups.pdfIn PDF document text
    • https://cdn.sqhk.co/bikegola/j8jfwig/nefuburajajide.pdfIn PDF document text
    • https://cdn.sqhk.co/rapawomo/aBojahc/86684937509.pdfIn PDF document text
    • http://puwisagoki.22web.org/pokemon_insurgence_strategy_guide.pdfIn PDF document text
    • http://daravto18.ru/78475615578e7mys.pdfIn PDF document text
    • https://bifekanivixu.weebly.com/uploads/1/3/1/4/131408854/5d4e041.pdfIn PDF document text
    • http://arnautmebel.ru/blood_group_test_app_freehohjt.pdfIn PDF document text
    • https://cdn.sqhk.co/gupimupiset/jfmk9MB/raiders_of_the_north_sea_solo.pdfIn PDF document text
    • http://blue-tick-central.com/20918876643o2cvm.pdfIn PDF document text
    • https://cdn.sqhk.co/miwataxanis/fn11tjc/uber_mexico_requisitos_para_ser_socio.pdfIn PDF document text
    • https://takewinedol.weebly.com/uploads/1/3/4/7/134768260/5784642.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/niporofez/27176939381.pdfIn PDF document text
    • http://sedegavokoxuk.epizy.com/jewish_bible_in_english.pdfIn PDF document text
    • http://digifasofow.rf.gd/amplitude_waveform_example.pdfIn PDF document text
    • http://pidejekakej.epizy.com/womivopivo.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/jaxunupofu.pdfIn PDF document text
    • http://rudurugineme.epizy.com/lerironasutuzelilovisa.pdfIn PDF document text
    • http://nabeput.epizy.com/roxawe.pdfIn PDF document text
    • http://latilofu.rf.gd/windows_10_hotkey_minimize_current_window.pdfIn PDF document text
    • http://kovobopejuwego.rf.gd/gikawawulazozanulebo.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/runovoxupivadajel.pdfIn PDF document text
    • http://pewafup.epizy.com/filovanitalututumexepev.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/53417909987.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_off0000f587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF587 5444 bytes
SHA-256: eed64bfe1f40f007c592ea54d2f1796b7fa3f578d9c899c894e027378a99558d
font_01_sfnt_off00010812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10812 9920 bytes
SHA-256: bf5e0398a0c2ea5866663baeba7ae45b685dfde99df17f30a0b5404125865d53

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