Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0aca36e79d6d72f…

MALICIOUS

PDF

71.4 KB Created: 2021-03-07 15:42:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d8240510c1c55590cd54d9ab29f2ffec SHA-1: 0eed7c91d0504ea1679c861018fdcca366f99b74 SHA-256: b0aca36e79d6d72ffec1e49b4d1e09a57f908edfd9b2ff026a5263e34432d106
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that directs the user to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to academic content, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wix?keyword=chapter+4+section+1+assessment+american+government+answers PDF link annotation
    • http://streamsweets.com/koaa_train_live_location0bdu3.pdfIn PDF document text
    • http://wapividazofar.scienceontheweb.net/clr_via_c_2019.pdfIn PDF document text
    • http://ideal-it.fun/47888687097jauls.pdfIn PDF document text
    • http://jolidulikan.scienceontheweb.net/craftsman_315_keypad_user_manual.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/zuxime/97703644688.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/what_size_screws_to_mount_tcl_tv.pdfIn PDF document text
    • http://leranijaw.rf.gd/bluetooth_for_windows_10_driver_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/dish_network_guide_list_all_channels.pdfIn PDF document text
    • http://jokilezitewoj.epizy.com/english_grammar_book_for_class_9.pdfIn PDF document text
    • http://kigetivizaru.epizy.com/dyson_v6_absolute_instruction_manual.pdfIn PDF document text
    • http://fazetotunoju.epizy.com/43997976486.pdfIn PDF document text
    • http://varijaponinaza.rf.gd/shield_vector_psd_free.pdfIn PDF document text
    • http://rurudowofalav.rf.gd/673963295.pdfIn PDF document text
    • http://girifatu.rf.gd/61590262762.pdfIn PDF document text
    • http://mepizegavipin.rf.gd/fleck_5600sxt_water_softener_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/facade_game_pc.pdfIn PDF document text
    • http://xijujoxeta.rf.gd/built_to_sell_review.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/gesipinid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2d1e26a-d238-4eb2-aeed-d83c748a1700/how_to_lose_weight_fast_for_heart_patients.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/015c7437-ec83-4bdb-83fb-335fec366d41/dizofuruwebugobuludomi.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_off0000d993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD993 5512 bytes
SHA-256: 3d2e04c6d2306e45e2940fbede06481a901e6cb750fd832bf05294295f072f6d
font_01_sfnt_off0000ec45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC45 10484 bytes
SHA-256: 2a154c3c4a6d13f7724d79a518c1731a29d88a5cd09b3fd67d769f05f45c7e58

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