Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b6ae377338c172b…

MALICIOUS

PDF

216.5 KB Created: 2021-03-22 01:03:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c64ec84cd6ac55607a8d8a6ac0a5ff87 SHA-1: 3486bc87a80d4c3eb5d8cc24d069045cefe917ba SHA-256: 1b6ae377338c172baadba74c9cea13fa6458b587d54916795971509c22c3cff0
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document body contains a URL that appears to be a lure, directing the user to a potentially malicious website. While no scripts were directly extracted, the presence of embedded URLs and the overall detection suggest a phishing attempt designed to lead the user to a malicious resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9385

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://crophysi.ru/award?keyword=reactions+of+thiosemicarbazide+pdf
    • http://interbankdigital.com/38190676003ojp9n.pdf
    • https://static.s123-cdn-static.com/uploads/4422135/normal_5fc7627d2526d.pdf
    • https://cdn.sqhk.co/tekuzorumuji/aYjagff/70937655284.pdf
    • https://cdn.sqhk.co/senaveduwiz/e3vqihk/agrarian_reform_problems_in_the_philippines.pdf
    • http://koreanluxe.com/lebidopakuzemegekixemeo43w3.pdf
    • http://lorebip.22web.org/voicemail_to_text_android_verizon.pdf
    • https://static.s123-cdn-static.com/uploads/4486971/normal_5fc7ebb80f3f3.pdf
    • http://digosige.mywebcommunity.org/what_does_the_acronym_smart_stand_for_answers.com.pdf
    • https://cdn.sqhk.co/neviragar/dChahd9/68395522518.pdf
    • http://rasprodavaika.ru/bidigeduzatxdyhv.pdf
    • https://cdn-cms.f-static.net/uploads/4368740/normal_60539ac13eb7a.pdf
    • http://ryursew.space/hd_wallpaper_love_birds_photosa5dj6.pdf
    • https://cdn.sqhk.co/fugovigul/hdcMjjv/best_recharge_card_scanner_ntc_ncell_users.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nokejufesuw.atwebpages.com/speak_now_digital_booklet.pdf
    • https://s3.amazonaws.com/fojaxexino/how_to_start_a_realistic_fiction_book.pdf
    • http://pozidijapepore.atwebpages.com/zetojuzikakojipab.pdf
    • http://lawiferow.myartsonline.com/axis_bank_personal_loan_application_form.pdf
    • https://s3.amazonaws.com/woxojuxafopuv/17536279718.pdf
    • http://gajovab.epizy.com/48256888676.pdf
    • https://s3.amazonaws.com/sorogamat/kamejulabigokoxofutaw.pdf
    • https://s3.amazonaws.com/juvuraguvutoxif/154012435.pdf
    • http://jufofokisib.epizy.com/going_postal_terry_pratchett_full_movie.pdf
    • https://s3.amazonaws.com/tosevud/26814919639.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://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002f650.bin
e6a14c13802b1aec86fd0aba1956a792643f74689d83c943e960e56befef0f55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F650 1656 bytes
font_01_sfnt_off0002fe9e.bin
7d5a7027a81396c73cadef0b820b0c6e5e6f348cc5c438b5ea135b51b2021499		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE9E 5560 bytes
font_02_sfnt_off00031164.bin
697de65e3085d9b3d74502b8e3d036e59fb42138802bad8eb1a8ec4487744633		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31164 13972 bytes
font_03_sfnt_off00033fd5.bin
dfdc6983d3c42b81f9741fa6cdceaab3e97c1fbda00e6274acf933e6ff911e94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x33FD5 16100 bytes

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