Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbc000b2fbab7bae…

MALICIOUS

PDF

104.1 KB Created: 2021-03-16 21:28:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7471f917d64145cdbdd9dbb708d90bde SHA-1: 919f32a2a4cf811b6982b304dc992da21134e684 SHA-256: cbc000b2fbab7bae8d7d3ce3316913454cf2299a4a90db6d479750024b6dbcfe
214 Risk Score

Malware Insights

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

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://yafferge.ru/123?utm_term=multiple+choice+quiz+maker+free In PDF document text
    • https://vinovebavelugis.weebly.com/uploads/1/3/1/3/131383284/somizegagikaxun.pdfIn PDF document text
    • http://spainwow.pro/toripovopikux7d5v0.pdfIn PDF document text
    • http://vkrowl.com/biblia_reina_valera_online_amen_amen6eedk.pdfIn PDF document text
    • http://usesalle.xyz/mofinumuladidudosekuximn2me3.pdfIn PDF document text
    • http://2220202.ru/jujepipowulokovudagesudevvitwd.pdfIn PDF document text
    • https://sarowamirubene.weebly.com/uploads/1/3/4/7/134736793/7209116.pdfIn PDF document text
    • https://lidutefavova.weebly.com/uploads/1/3/4/0/134012516/4945421.pdfIn PDF document text
    • http://imedo.ru/singer_301_foot_controlukxly.pdfIn PDF document text
    • https://givodevivunafa.weebly.com/uploads/1/3/1/8/131871579/122da17d9ac9b1a.pdfIn PDF document text
    • http://fikodon.iblogger.org/xuwoguloriwipotusazum.pdfIn PDF document text
    • http://sevastopol.sale/kovamunigunuax0id.pdfIn PDF document text
    • http://kyhni.site/zomazidagugodapod2i01e.pdfIn PDF document text
    • http://chestlune.online/61355360990fxssc.pdfIn PDF document text
    • http://huseyincanx.com/reading_comprehension_strategies_for_2nd_gradeukc6a.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/lorerexeg/zapemud.pdfIn PDF document text
    • http://vewemisesafi.epizy.com/what_were_the_social_factors_that_led_to_the_renaissance_in_italy.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/85995505731.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/baixar_jogos_ppsspp_android.pdfIn PDF document text
    • https://65de77fc-0341-4fd2-89b2-cd6b005a91de.filesusr.com/ugd/cf79db_a1753adc9ec64f2682abbd44949397c7.pdf?index=trueIn PDF document text
    • http://misibinebob.epizy.com/chromebook_14_g4_android_apps.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/41085865968.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/ghatna_chakra_history_in_english.pdfIn PDF document text
    • https://6a9ecc2b-05c3-4056-8705-773ae6be8cdd.filesusr.com/ugd/7a359d_c201aec3f0fe44c2828a058f7d9566ed.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000142ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142EE 5320 bytes
SHA-256: 1eef689b1ee4a33fe6f9fb596a171e965872b0e758b2c43a092e90e75447259b
font_01_sfnt_off000154f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154F8 11572 bytes
SHA-256: f67a47d0ccd8b67922b983061905a10c0a3800f659303165ab75c178419c68b5
font_02_sfnt_off00017c88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C88 16060 bytes
SHA-256: 5b0d2701ab39d2f69c66d7d16c60d8db0b323aa0832947137e757b5401d27330

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