Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef0bb84026d05ae7…

MALICIOUS

PDF

73.5 KB Created: 2021-03-28 16:03:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 960d0c0f4113ff697900e928eb363da8 SHA-1: d5fcb61099df41e67f4f9569c880cc8b844eb458 SHA-256: ef0bb84026d05ae7d293a2cffb855defea5a11c257a47b0ca1621b54759a9cf1
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that points to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, suggests a lure related to 'active passive all tenses pdf'. The primary IOC is the malicious URL, which is likely used to deliver a secondary payload or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://jacksth.ru/award?keyword=active+passive+all+tenses+pdf PDF link annotation
    • https://cdn.sqhk.co/waxolulum/YbVhdvz/wifefuxagup.pdfIn PDF document text
    • https://cdn.sqhk.co/duromivap/gdmiahg/walkthrough_of_among_us_gameplay_free.pdfIn PDF document text
    • http://xujaxul.mywebcommunity.org/shakespearean_language.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366664/normal_603c120e1a40d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422180/normal_604baaef0d4dd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426828/normal_5ff65015e36c1.pdfIn PDF document text
    • http://retapadu.medianewsonline.com/roland_td_30_hi_hat_problem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470685/normal_6054656cb0f04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365553/normal_60210d80915a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413019/normal_5fd6aa20d4def.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411714/normal_5fe24579d7e32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370055/normal_601add3cda93c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470552/normal_5ffa776dd81a2.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/zubuwujoxom/what_island_is_the_stairway_to_heaven_on_in_hawaii.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/hypixel_skyblock_potion_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/nafavekoxep.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/kotor_2_companion_influence_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/vefagotoje/possessive_nouns_worksheets_with_answers.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE422 5104 bytes
SHA-256: 1d1def45ca2380bfc3e4e282dad78ebf9780d22a192b226ccccb499dbb6a6dba
font_01_sfnt_off0000f59e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59E 10368 bytes
SHA-256: dc0b6522d5eb637e5420637bad02670f57d0861fa9b2336ebce77b9b1f4f858c

Open this report in the interactive analyzer, or submit your own file for analysis.