Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ea3bae7fc9d53a3…

MALICIOUS

PDF

79.5 KB Created: 2021-04-20 00:24:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a369b5f26df9f5504e813930c2b4385b SHA-1: b360b941739d6cfad2d06d645840b5c053339a0a SHA-256: 3ea3bae7fc9d53a35f439ee6d3617425c8a1d334330babf75c126674ba1b84be
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that directs users 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 a common household appliance error code to entice clicks on the malicious link.

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://midufefew.ru/strik?utm_term=paloma+tankless+water+heater+error+code+ao+21
    • http://serarudipiwuvon.mypressonline.com/death_of_a_salesman_short_summary.pdf
    • http://yourcy.com/28070021422id9ti.pdf
    • http://zasufigonibat.getenjoyment.net/11824699093.pdf
    • https://cdn.sqhk.co/remimidotomi/jdhhy8v/16945224780.pdf
    • http://zabemaladameg.medianewsonline.com/76315090974.pdf
    • http://milanbeachs.space/how_do_you_fix_a_tv_that_turns_on_but_no_picturex31nb.pdf
    • https://cdn.sqhk.co/muzipajat/igfjjgf/11247137735.pdf
    • http://wonder-ita.space/public_speaking_guidelineso2p9i.pdf
    • http://floradoma.net/kivorigitafulamur6vbt4.pdf
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdf
    • https://cdn.sqhk.co/ruwonumatag/idhehjt/puzzle_mazes_more_apkpure.pdf
    • http://reduslim-shop.website/best_browser_for_online_videos_android6srxp.pdf
    • http://aycotoro0.xyz/what_is_proofs_in_mathffrwg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/794bc802-a357-4106-a158-d23e2ad7e492/33018156115.pdf
    • https://uploads.strikinglycdn.com/files/9c4df79b-899e-413a-8ee7-a965694bc547/45108792887.pdf
    • http://teluroluxeterez.myartsonline.com/bigmouth_strikes_again_tab.pdf
    • http://teropisarazo.myartsonline.com/12358187921.pdf
    • https://uploads.strikinglycdn.com/files/6ecb3ae5-b9de-4341-9334-4076d7691c35/66111666464.pdf
    • https://uploads.strikinglycdn.com/files/b2057a50-6a83-4787-99e7-c0161f0d7e2c/the_land_of_stories_beyond_the_kingdoms_reading_level.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eac0.bin
3b24eba8ff4368eb148b5f6b127c84ac34f3fdee51555ccdb055e779d0984e87
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC0 5260 bytes
font_01_sfnt_off0000fc84.bin
d54e660e4322f4c02739262d33157852f8b3127de7439a680a69387e7818684e
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC84 11048 bytes
font_02_sfnt_off0001226d.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x1226D 4324 bytes