Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff6ae73dcf605280…

MALICIOUS

PDF

76.2 KB Created: 2021-03-13 13:43:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: cacc5de2b0b39d4545d8fbad1e4668b4 SHA-1: 5a19195992449df076bc05448540376919ad1abc SHA-256: ff6ae73dcf605280b084d4dc7b5fcb366f1d7a1fa43bf61c61e8a74d04cabb8c
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URI pointing to a suspicious domain, which was flagged by heuristics and a machine learning classifier. ClamAV also detected it as a phishing trojan. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'Yahoo answers girl names', suggesting a lure to a potentially malicious website.

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/wix?keyword=yahoo+answers+girl+names PDF link annotation
    • http://gimatadokij.mygamesonline.org/xifirikerexij.pdfIn PDF document text
    • http://pelabinowoguk.getenjoyment.net/printable_t_shirt_template.pdfIn PDF document text
    • https://cdn.sqhk.co/lijipatalenu/eNhcgh6/punjabi_radio_online_free_listen.pdfIn PDF document text
    • https://cdn.sqhk.co/muvotugi/gjfghCH/gps_live_navigation_map_directions_and_explore.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411935/normal_5ff3b9be1fbfb.pdfIn PDF document text
    • https://cdn.sqhk.co/fovugemut/FhdFIR1/unikey_for_macbook.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499622/normal_5fd199ab6d91b.pdfIn PDF document text
    • http://vatidenow.medianewsonline.com/xelanonunatawogifufobibin.pdfIn PDF document text
    • https://cdn.sqhk.co/vamalowawepi/kAXoOLp/roast_carrots_nutritional_information.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xajumin.epizy.com/azur_lane_bgm.pdfIn PDF document text
    • http://bopexetosezulav.rf.gd/how_do_you_say_sunrise_in_italian.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/infinity_blade_2_gems_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/pakev.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/mi_airdots_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/79548155028.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/wejapusolimasemarepu.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/60337919456.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/el_principio_del_placer_segun_freud.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/kenmore_sewing_machine_repair_manuals.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_off0000ee1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1F 5152 bytes
SHA-256: f5b4749ce5d2d0da156a67c61cf053b8ae02c43e6653219d77a4057442f886d9
font_01_sfnt_off0000ff91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF91 10756 bytes
SHA-256: 31e5b73459f8703c5ec78b5586c83847d5cee713c0a9760c65321e21e9582e53

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