Malicious PDF — malware analysis report

Static analysis result for SHA-256 84a324c98fd57a60…

MALICIOUS

PDF

80.7 KB Created: 2021-02-16 10:37:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 59e4788e64fd7f5317fa00f739e2ed2b SHA-1: de974ee250a63781544e6c7edc37a3439d209ddf SHA-256: 84a324c98fd57a60067b8a13fd9580d4f9b301285c26558f7a7d87e2572df932
116 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a callback phishing or tech-support scam. The document body, though heavily obfuscated, contains text that suggests a lure. The presence of multiple external URLs, some of which are associated with PDF files, indicates potential redirection or payload delivery. No scripts were extracted from this sample, limiting the ability to determine specific execution chains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://bologen.ru/aws?utm_term=relaciones+en+un+diagrama+de+clases PDF link annotation
    • https://cdn.sqhk.co/lusajiki/Riegcig/fishing_food_game_online_free.pdfIn PDF document text
    • https://cdn.sqhk.co/busibelifiv/jbeiiC4/87518316165.pdfIn PDF document text
    • http://zexinebizo.22web.org/bullet_raja_song_mr_jatt.pdfIn PDF document text
    • https://cdn.sqhk.co/javijaxim/ajhjdha/bipiwutumiwe.pdfIn PDF document text
    • https://cdn.sqhk.co/sisadenev/ggeENij/rollercoaster_tycoon_4_mobile_free_land.pdfIn PDF document text
    • https://cdn.sqhk.co/mowasikuso/jfgfrjg/64903492648.pdfIn PDF document text
    • https://cdn.sqhk.co/wafasojudo/AqBoQhe/65312012286.pdfIn PDF document text
    • https://cdn.sqhk.co/fapetemiji/hmAm3v9/online_recharge_lycamobile_sweden.pdfIn PDF document text
    • http://kosufezegaxid.iblogger.org/add_c_templates_to_visual_studio.pdfIn PDF document text
    • https://cdn.sqhk.co/wikelere/fhbiggn/71466147826.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
    • https://s3.amazonaws.com/xamapebonijos/24035630633.pdfIn PDF document text
    • http://josusasufuni.epizy.com/ruduzirede.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/wasedikemu.pdfIn PDF document text
    • http://wiwafejopof.epizy.com/buzekojawolomisevotata.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/despacito_ringtone_iphone_mr_jatt.pdfIn PDF document text
    • http://gasunerumep.rf.gd/bepufowe.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/bronte_beach_surf_report.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/aye_aye_rajput_video_song.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF19 5068 bytes
SHA-256: 51f10e6082b6e9629aa16dcaf33e1dda9b4707b78d3574c74242e0c85353d0da
font_01_sfnt_off00010030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10030 11944 bytes
SHA-256: 664d1b95dac65ef514f2fa46fe785d91dc9f0b648e2820a41b6d47655c821b0d
font_02_sfnt_off00012754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12754 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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