Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3e73bdbdafb5bb6…

MALICIOUS

PDF

81.2 KB Created: 2021-03-28 11:29:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 209f0cccbbdf5d1618663dc1ac72eee6 SHA-1: b7bec6eb41a34759fab962e36eba7aaf7464fad1 SHA-256: a3e73bdbdafb5bb69b099d81fe53e5779f4e066795fe44ac1e3da88dd87dd165
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a primary focus on directing users to 'fokemale.ru'. Heuristics indicate this PDF is a link farm on disposable hosting, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites for credential harvesting or malware delivery.

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://fokemale.ru/award?keyword=paises+y+nacionalidades+en+frances+pdf PDF link annotation
    • http://apeech.ru/average_cost_to_repair_a_cuckoo_clockmervk.pdfIn PDF document text
    • http://pogadai.xyz/uc_browser_mini_free_old_versionej532.pdfIn PDF document text
    • https://cdn.sqhk.co/somatugogo/euiaDIR/asphalt_8_vs_asphalt_9_android.pdfIn PDF document text
    • https://cdn.sqhk.co/xovepejegosi/1Hkhhha/prestonplayz_among_us_live_stream.pdfIn PDF document text
    • http://reactivaperu-viabcpi.com/fruit_cutting_knife_games0mrs1.pdfIn PDF document text
    • http://carbags.site/is_life_easy_in_americalcre3.pdfIn PDF document text
    • http://ulekschool.online/ap_products_013-509_manualv82hz.pdfIn PDF document text
    • http://nusoxex.iblogger.org/xoginad.pdfIn PDF document text
    • https://cdn.sqhk.co/fuzomorikat/iiczjjj/sheltered_part_or_side_crossword_clue_3_letters.pdfIn PDF document text
    • http://watercart.ru/xapawubuguwozosajijukij4pmzm.pdfIn PDF document text
    • http://copyright-central-media.com/jomibujasivafepotisasiss1bld.pdfIn PDF document text
    • http://mon-cmso.best/stretch_band_exercise_routine26tlu.pdfIn PDF document text
    • http://gisejol.iblogger.org/regrouper_2_documents_en_un_seul.pdfIn PDF document text
    • https://cdn.sqhk.co/mojupesonon/jhg9ot0/13345101985.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/jutenojamega/sir_gawain_and_the_green_knight_stanza_1_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/70288346649.pdfIn PDF document text
    • http://tesalivolanimeg.rf.gd/3022739030.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/lozedix.pdfIn PDF document text
    • http://sakigekoxigukil.epizy.com/tojonomunanogujefatikino.pdfIn PDF document text
    • http://tofisazo.epizy.com/no_longer_slaves_bethel_chords.pdfIn PDF document text
    • http://xapemekofutomun.rf.gd/48191544832.pdfIn PDF document text
    • http://ratofozobafizok.epizy.com/myron_mixon_rib_bbq_sauce.pdfIn PDF document text
    • http://sisuraregimu.rf.gd/zatofadobirut.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/viper_alarm_remote_battery_died.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_off00010061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10061 5252 bytes
SHA-256: f43186e822012955b56a0c991625071de0be75aa5fd89484b0c7dba1f841d792
font_01_sfnt_off00011259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11259 10704 bytes
SHA-256: 335f4de6220320fef0834a67a3d52c698c9820988fb51d3b2ad71bba2b8f7c8b

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