Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2a4c4951ccc547b…

MALICIOUS

PDF

79.1 KB Created: 2021-03-12 13:37:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 5e353f55f65730fb3ae38b8f34d9a96b SHA-1: 712ae6e0e3deba35af171ec99b80555071930f04 SHA-256: a2a4c4951ccc547bc7212804701e6d259941a318ec0859efefa87c6ccb83ced7
156 Risk Score

Malware Insights

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

The file is a PDF that contains a large number of external links, many of which point to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' heuristics. The ClamAV detection further confirms its malicious nature, identifying it as 'Pdf.Phishing.Trojan'. The embedded URL 'https://dugedepap.ru/strik?utm_term=charles+darwin+on+the+origin+of+species+citation' suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://dugedepap.ru/strik?utm_term=charles+darwin+on+the+origin+of+species+citation PDF link annotation
    • https://cdn.sqhk.co/bidekidarub/jijpjg0/project_drift_battle_car_racing_game.pdfIn PDF document text
    • https://galixasuja.weebly.com/uploads/1/3/4/5/134518214/galofitomu-rorelibave.pdfIn PDF document text
    • https://cdn.sqhk.co/dudugetogi/Whjjhbc/crazy_cooking_star_chef_mod_apk_revdl.pdfIn PDF document text
    • http://butijimixuf.iblogger.org/which_language_is_required_for_android_development.pdfIn PDF document text
    • https://nemelodanunoju.weebly.com/uploads/1/3/0/8/130874480/ed3a4fae7.pdfIn PDF document text
    • https://cdn.sqhk.co/sopiloroda/87jgjhj/warlords_of_new_york_sale_ps4.pdfIn PDF document text
    • https://pimetukuke.weebly.com/uploads/1/3/4/0/134017259/danuxuwanofax.pdfIn PDF document text
    • https://manoduxasef.weebly.com/uploads/1/3/4/0/134041035/74725e81a4.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/fukepez/giridih_district_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/piborotadanosutenoniz.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/34281919616.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/fonepatopa.pdfIn PDF document text
    • http://beturatigamoli.epizy.com/example_of_grading_sheet_in_college.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/mandated_reporting_training_nj.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/pujixizuzexegixot.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/carrier_air_conditioning_remote_control_manual.pdfIn PDF document text
    • http://xigasew.epizy.com/how_to_turn_on_dyson_ball_vacuum.pdfIn PDF document text
    • http://femumakowaw.epizy.com/canon_580ex_ii_not_firing.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/husqvarna_automower_manual_315x.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/free_sheet_music_for_flute_and_piano.pdfIn PDF document text
    • http://wuzuruwevirelu.rf.gd/71841084626.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/98998723004.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_off0000f3c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C5 5416 bytes
SHA-256: e13ae612d645aed265bf0345a979f2be8c8b426b7439db0b80cd74e43aac16a5
font_01_sfnt_off0001063b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063B 13092 bytes
SHA-256: 4d8c572e3be8645903861e95ede79323b8bd387c1abb1621dbd9af5a5624e83c

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