Malicious PDF — malware analysis report

Static analysis result for SHA-256 84afa869f44b717f…

MALICIOUS

PDF

79.3 KB Created: 2021-04-01 00:04:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 901142b6c2d92f84b989ba562a9641f6 SHA-1: 2844a0c88813082e7c3d76036f4b48c11e7bfd82 SHA-256: 84afa869f44b717ff22a813d1a94ea0d4f33117714d367a2b17b61748d497c20
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/award?keyword=l+carnitina+dosis+pdf PDF link annotation
    • https://cdn.sqhk.co/mibuguxinise/5EhhsMP/diba_true_shoes_reviews.pdfIn PDF document text
    • https://tajuboramaze.weebly.com/uploads/1/3/4/5/134591815/5a4076413c9864e.pdfIn PDF document text
    • https://cdn.sqhk.co/jezumasulej/jdgfshf/push_maze_puzzle_level_359.pdfIn PDF document text
    • https://mafexanilexa.weebly.com/uploads/1/3/0/7/130739060/4484916.pdfIn PDF document text
    • https://nifirasevaxo.weebly.com/uploads/1/3/4/7/134756957/gezolada.pdfIn PDF document text
    • http://leseweremizew.scienceontheweb.net/seroke.pdfIn PDF document text
    • http://gasurorir.sportsontheweb.net/what_order_should_i_read_the_expanse.pdfIn PDF document text
    • https://cdn.sqhk.co/ruweragi/haicXif/razutupetadaxege.pdfIn PDF document text
    • https://deremufirig.weebly.com/uploads/1/3/4/8/134854029/mefisivenujel-betag-mepabotaf.pdfIn PDF document text
    • https://cdn.sqhk.co/lirebirab/eTtmhfY/up_fitness_dc.pdfIn PDF document text
    • https://magivuvesef.weebly.com/uploads/1/3/0/7/130775451/jemijolegi_wijovi_mazaj.pdfIn PDF document text
    • http://biniwitovo.mywebcommunity.org/sufenaguworanifoxadol.pdfIn PDF document text
    • http://lizoguxumugef.mywebcommunity.org/how_to_test_sexuality.pdfIn PDF document text
    • http://jekeluxuto.mywebcommunity.org/aiag_fmea_handbook.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/wutezigojuxi/conversion_from_cartesian_to_polar_coordinates.pdfIn PDF document text
    • http://zuzopejorexa.onlinewebshop.net/waktu_solat_pulau_pinang_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/boldon_james_classifier.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59e9de7d-b932-4f98-86ce-ee1f564fe80a/citizen_eco_drive_gold_ladies_watch.pdfIn PDF document text
    • http://bexovivuvere.myartsonline.com/samubujelawunoriti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29691b71-1418-4a63-b939-546d16fee75c/wogajutejavabixonukuxatu.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/78234412132.pdfIn PDF document text
    • http://kikukuvikato.myartsonline.com/alternity_downloads.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_off0000f3f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F4 5056 bytes
SHA-256: 40685a9c5bd285e85c4053060697a4697ff1c651e4f5d082f913cfa746aadd06
font_01_sfnt_off00010538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10538 12788 bytes
SHA-256: e9e6c880c1c30ad6f1b172555f062b716b76f1c61b7f0f31dc04105d4cb9296f

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