Malicious PDF — malware analysis report

Static analysis result for SHA-256 3501c20ddccb55d9…

MALICIOUS

PDF

420.1 KB Created: 2021-03-17 04:31:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 00787af0b7509148600b0a1806d591c2 SHA-1: 241bb1004028e9129c90e5c858b5aa508ce54877 SHA-256: 3501c20ddccb55d997884cdf64d9a7228377cb6b1c06f0e3b4bb37c138bec8f7
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious download or phishing page. The document body, though heavily obfuscated, appears to be related to software downloads, reinforcing the phishing or malware delivery lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9569

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://midufefew.ru/wix?keyword=amtlib.framework+cs6+mac+%25E3%2583%2580%25E3%2582%25A6%25E3%2583%25B3%25E3%2583%25AD%25E3%2583%25BC%25E3%2583%2589 PDF link annotation
    • http://kersita.fun/lemuwovoviweqri8l.pdfIn PDF document text
    • http://resogizona.iblogger.org/lodazexovofovumo.pdfIn PDF document text
    • http://pagebake.com/zusuditediraseretomocu6v0.pdfIn PDF document text
    • https://cdn.sqhk.co/kagalitisup/VhbPpig/football_flick_urban_skills_trainer_costco.pdfIn PDF document text
    • http://cmb-eco.com/true_colors_test_blue_meaningbocgt.pdfIn PDF document text
    • http://jufobimagif.iblogger.org/liketumilokeramokadik.pdfIn PDF document text
    • http://marafonsport.site/83354716242ayum7.pdfIn PDF document text
    • http://businesshelpservice.com/fobuneferajumitewumuvix7wcra.pdfIn PDF document text
    • http://ritual-venki.online/389170787480o5f9.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/lthggcK/povononunowajum.pdfIn PDF document text
    • https://cdn.sqhk.co/dujepiwewi/je2WgjH/71864438769.pdfIn PDF document text
    • https://cdn.sqhk.co/furigelo/EHbjdid/12527712101.pdfIn PDF document text
    • http://italiahot.fun/barcelona_vs_real_madrid_5-_0_videoc4m9b.pdfIn PDF document text
    • http://bettyloustintruckbbq.com/ejercicios_de_lexemas_y_morfemas_resueltos_1o_esoxud8z.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/zifozujiwi/third_person_survival_games_android.pdfIn PDF document text
    • https://s3.amazonaws.com/gupojakami/cset_english_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/simple_present_exercises_esl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71dd1157-b433-42d4-baae-bc3b1f43dc4a/blood_in_bowls.pdfIn PDF document text
    • http://sazuronami.epizy.com/90466923326.pdfIn PDF document text
    • http://fifaleniw.epizy.com/miguel_de_cervantes_biografia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da69e8fb-b081-418d-8c2e-9e61650a4f72/99191162470.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5398e00a-a4f5-406f-b117-b58465efa3a0/is_diablo_3_local_co_op.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/jbl_flip_3_vs_flip_4_in_hindi.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0001f597.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1F597 365652 bytes
SHA-256: d35397fb4335f492c7e5d3f78dbf5cf689f93d4f057ac5635cc87b3861d1e6a5
font_01_sfnt_off0006145f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6145F 3884 bytes
SHA-256: 853476d297d1a7bc70f62938e1812c604d1056ae80526389a3e64485d3cb42c2
font_02_sfnt_off0006220b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6220B 5500 bytes
SHA-256: 0717ef0d06b90ecc0bf1b91681ad4cc5499e45c28594c61b728140baab8b4a88
font_03_sfnt_off000634c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x634C3 13600 bytes
SHA-256: c815293c0ca8e21415a824d0691c7a9b2e5bdad181754391732149636da767ca
font_04_sfnt_off00066347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66347 18768 bytes
SHA-256: 89ea8cdb4b60ff49546bc1fe97e5dab56e1945459516f85ee8e770b475c1dbca

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