Malicious PDF — malware analysis report

Static analysis result for SHA-256 06c7aefca145767c…

MALICIOUS

PDF

84.2 KB Created: 2021-03-18 12:16:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f439efeaed88e1eaaaad7e3ef009bcf5 SHA-1: fabc70309cff044d4586bf5ea58930a149a44237 SHA-256: 06c7aefca145767c6ae83cb8052fe4ca2ff7ac60312bad7c8ce301ce9b7ef555
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 0.9993

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://baarspo.ru/123?utm_term=characterization+traits+worksheet PDF link annotation
    • http://zurujavurobe.scienceontheweb.net/adobe_photoshop_7._0_shortcut_keys_list_in_urdu.pdfIn PDF document text
    • http://steelsho3.club/realidades_1_capitulo_1b_como_es_answers2q39u.pdfIn PDF document text
    • http://sayseedokg.com/668439674489w1w6.pdfIn PDF document text
    • http://xenifizonuk.22web.org/how_to_get_answers_on_course_hero.pdfIn PDF document text
    • http://dogisutuzise.22web.org/15880683353.pdfIn PDF document text
    • http://xebubux.sportsontheweb.net/gasitokeloxoro.pdfIn PDF document text
    • http://carins.info/megidasagubogepinasmpz0z.pdfIn PDF document text
    • https://pigamudabuv.weebly.com/uploads/1/3/4/2/134235231/vixegapite.pdfIn PDF document text
    • https://gabodubelekopo.weebly.com/uploads/1/3/4/3/134356924/jurakikavoj-bexati-nonifilerap.pdfIn PDF document text
    • http://believes.space/flomasta_22199sx_instruction_manualue5i2.pdfIn PDF document text
    • http://jetavof.sportsontheweb.net/how_to_play_the_online_dating_game.pdfIn PDF document text
    • http://rodina38.ru/what_colors_does_the_taurus_g2c_come_inzt7e8.pdfIn PDF document text
    • https://vesokawewewavi.weebly.com/uploads/1/3/1/3/131382886/buzifofogazitopo.pdfIn PDF document text
    • https://fasanisig.weebly.com/uploads/1/3/0/7/130739318/5896df2834d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://giwilefo.rf.gd/wintercroft_mask_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/salmo_91_de_la_biblia_catolica_dios_habla_hoy.pdfIn PDF document text
    • https://7f3dc8b3-869c-44c5-82eb-14ae88d57796.filesusr.com/ugd/dc4ca1_ee2ee84a10294a23ae755c6a8d73780f.pdf?index=trueIn PDF document text
    • http://ferunatax.epizy.com/kukamupiwavitu.pdfIn PDF document text
    • http://boxemoje.epizy.com/spatial_data_and_attribute_data.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/91034052696.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/how_to_print_wirelessly_with_hp_envy_4500.pdfIn PDF document text
    • https://78151a86-a557-4e49-81aa-a2539eea45c7.filesusr.com/ugd/204f4f_8ff67f6a9cd549eb98c19d72efea8c33.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/megulu/bushveld_complex_formation.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/a_history_of_western_philosophy_from_the_pre-socratics_to_postmodernism.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_off00010b6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B6C 4964 bytes
SHA-256: 563055917d512bb758eb1646acb031b9b5f76998e705b24d84912abc4e39dd11
font_01_sfnt_off00011c5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C5F 11484 bytes
SHA-256: 15fbab28082e08ed10db3cc5302e616b247230a99ef04514ac78842c283db503

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