Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f77a19f0b00ab7d…

MALICIOUS

PDF

97.9 KB Created: 2021-04-03 18:44:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 974ce70d410d9b12e139174738e8e536 SHA-1: e95ec75a299adfd51d12a8afb9522f9c89a5edd7 SHA-256: 2f77a19f0b00ab7d3546cc39d7ac97ef0d6fe911b5be8da0c58b604fc7803a75
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and a machine learning classifier, with a high risk score. It contains an embedded URI pointing to 'https://maypoin.ru/award?keyword=generation+z+consumer+behavior+pdf', which is a strong indicator of a phishing or malware distribution attempt. The PDF structure itself also shows signs of manipulation, with duplicate object bodies.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/award?keyword=generation+z+consumer+behavior+pdf
    • https://cdn.sqhk.co/kixarozikej/5x5ll6o/19452958362.pdf
    • http://hangzhoumetal.ru/what_is_the_metric_unit_for_length_meters_miles_distance_inchesu9qs4.pdf
    • http://taptopbot.com/98534866217y575x.pdf
    • http://agreevudb.rest/relion_blood_pressure_monitor_manual_hem-780reldjxgv.pdf
    • https://cdn.sqhk.co/kidurukazag/AdR8xhj/57447776629.pdf
    • https://cdn.sqhk.co/dipasupor/bihWSVT/evacuation_plan_template_for_home.pdf
    • http://uabiomanix.xyz/60297351800au6uj.pdf
    • https://cdn.sqhk.co/bokirebi/hegihid/another_word_platformer_2._0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5e0b52e9-907e-4412-b661-8c0b10a1e4ee/24613248723.pdf
    • http://rigagidepa.epizy.com/sovojumexovekefenukilubaj.pdf
    • https://uploads.strikinglycdn.com/files/6eeadc47-01fa-4f23-a914-67e537c7df8c/zodafu.pdf
    • https://uploads.strikinglycdn.com/files/2b6c01f6-8c4b-453c-a5dc-6f54efa25c80/insignia_ns-str514_specs.pdf
    • https://uploads.strikinglycdn.com/files/176dee63-446b-48ca-9c18-a49bdf6df0ce/how_to_charge_a_razor_e300_scooter.pdf
    • http://farevuzafi.rf.gd/what_does_a_crossover_cable_look_like.pdf
    • https://uploads.strikinglycdn.com/files/71db37d0-5cdc-4523-8f61-bbc0c1cef4fb/25030416747.pdf
    • https://uploads.strikinglycdn.com/files/287ad6a7-d6f2-455f-8c70-5bba985c5909/longman_dictionary_app_for_android_free_download.pdf
    • https://uploads.strikinglycdn.com/files/4ed12a29-bb1b-4fc7-8cef-1d4940d1b7da/garmin_vivofit_jr_2_user_manual.pdf
    • https://uploads.strikinglycdn.com/files/798666bb-c473-4a8b-b2da-57561e215db2/what_the_book_after_the_last_olympian.pdf
    • http://fidobagasamos.epizy.com/chess_tactics_app.pdf
    • https://uploads.strikinglycdn.com/files/da8af4d8-6ba7-4853-aa75-66215e7aa2ee/how_to_day_trade_on_robinhood_without_25k.pdf
    • https://s3.amazonaws.com/faluzotixupi/76812470568.pdf
    • https://s3.amazonaws.com/sowirutelevolur/21081428367.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013d32.bin
577d856575b3e73becc4b6dd3fd62109c35cc4609683162bddb8c736e36789f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D32 5644 bytes
font_01_sfnt_off00015042.bin
e8adc6e35854c9f5312053bfe9d6227ed96d6fe6a710012a3401bb0295a1a431		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15042 11704 bytes

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