Malicious PDF — malware analysis report

Static analysis result for SHA-256 0052e8bd1211c42d…

MALICIOUS

PDF

80.8 KB Created: 2021-03-25 00:28:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e065605d80daf823f11c1117caf370af SHA-1: 3ca6c37f568c9efe64a52f2aa95fdde9bd54f749 SHA-256: 0052e8bd1211c42d3c4d43beebbf207eb481b5107d5bedce3ee680cdb42286ab
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 0.9998

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://seumenha.ru/wix?keyword=michael+kors+sunglasses+mk1039b PDF link annotation
    • http://zurujavurobe.scienceontheweb.net/trasplante_de_medula_osea.pdfIn PDF document text
    • http://datiwufirul.medianewsonline.com/73706590772.pdfIn PDF document text
    • http://wowitaly.pro/what_is_the_best_portable_cd_player_to_buyogax5.pdfIn PDF document text
    • http://nuverlites.online/android_os_distribution_by_countrysoeg2.pdfIn PDF document text
    • http://legendbilisim.com/the_ascent_of_money_-_dreams_of_avarice_episode_1_summary6m1ql.pdfIn PDF document text
    • http://magazinrf.xyz/zegubulopiqav.pdfIn PDF document text
    • http://biggymstoe.com/idle_mafia_tycoon_manager_modggosu.pdfIn PDF document text
    • http://labebatazavanoz.mygamesonline.org/chaus_english_speaking_book_in_marathi_free_download.pdfIn PDF document text
    • http://konifipajig.iblogger.org/consumer_reports_summer_tires_ratings.pdfIn 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://notijukigexu.rf.gd/kajojeparubumikibu.pdfIn PDF document text
    • https://s3.amazonaws.com/falejogajir/luzufilepabokewevabirafo.pdfIn PDF document text
    • http://zimemotom.rf.gd/agrobacterium_heat_shock_transformation_protocol.pdfIn PDF document text
    • http://wepadikonotu.epizy.com/33265138592.pdfIn PDF document text
    • http://lulanikigog.epizy.com/pdp_afterglow_headset_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/27867754322.pdfIn PDF document text
    • http://degepedafapuf.epizy.com/1146178337.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/sujajaruweduxozab.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/all_in_one_game_apk.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF2 5740 bytes
SHA-256: 8e393dda8508f9df122fffbe77c50558ddc713a7c59ee735d098048b63ae6769
font_01_sfnt_off0000ff34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF34 11608 bytes
SHA-256: 739ed8793b70145b84376357526b75de2449fe7f71a969e1fe473525140f7cd7
font_02_sfnt_off000126a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126A0 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3