Malicious PDF — malware analysis report

Static analysis result for SHA-256 aade805736bdceb8…

MALICIOUS

PDF

81.6 KB Created: 2021-02-16 01:43:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 694c3895181ae976806721902f208d51 SHA-1: d53f2941ebeddc473591ff20ef5492ae1c7fe81b SHA-256: aade805736bdceb8c0e5e7e976c87eefdb09199f1145cf045ece264fd12037a2
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, suggests a lure related to medical information, which is a common tactic for phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/123?utm_term=what+happens+at+a+pre+op+appointment+for+laparoscopy PDF link annotation
    • http://kozaredibedemok.iblogger.org/53841853865.pdfIn PDF document text
    • https://cdn.sqhk.co/kewesowovim/5fmMjeO/34015066953.pdfIn PDF document text
    • https://cdn.sqhk.co/notenirikev/xqgcggO/26666841790.pdfIn PDF document text
    • http://bijipejip.iblogger.org/juvogowar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458144/normal_60198c97383f3.pdfIn PDF document text
    • https://cdn.sqhk.co/lexijunibul/hcchhja/pixel_warfare_unblocked_games_76.pdfIn PDF document text
    • https://cdn.sqhk.co/jisepozidis/jaejhjc/ronofizetuzigikosimojibig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://karadefega.epizy.com/n_c_r_b_report_2018.pdfIn PDF document text
    • http://talakukatutevib.epizy.com/counter_strike_half_life_free_1._6.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/63238377043.pdfIn PDF document text
    • http://gidubivej.rf.gd/87187184544.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/63601237227.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/10555600737.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/autocad_free_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/1969739831.pdfIn PDF document text
    • http://fipuxogililego.epizy.com/48743963028.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE61 5160 bytes
SHA-256: 92bd61ad6c1b52585a5ef713c1a23188d6556bc2b8a2904cfb85b4b21e6b3f3f
font_01_sfnt_off0000efc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC9 10656 bytes
SHA-256: e2fd1feb2a37b6e6d1105d1d4a4bba374562909713e35c3a99006e2d72385093
font_02_sfnt_off00011478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11478 16312 bytes
SHA-256: b2563e85233037e3c2780690ed1455257f868516b5a962e54e6ffe29314c9cb1
font_03_sfnt_off00012a03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A03 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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