Malicious PDF — malware analysis report

Static analysis result for SHA-256 39ee50d91ce3cae4…

MALICIOUS

PDF

68.8 KB Created: 2021-02-27 01:54:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c8e3c0b7152f667028cdd3888eaf8cfb SHA-1: 00b6f856b84b3ebb92198742034ebdd0147e3b7a SHA-256: 39ee50d91ce3cae433bcbb71d3d54cc5c1adac96569098369f0ad032aa02b93f
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a suspicious domain, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though partially garbled, contains text related to playing video games and mentions wkhtmltopdf, which can be used to generate PDFs from HTML, potentially as part of a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/strik?utm_term=play+video+games+with+my+friends+online PDF link annotation
    • https://lolujimibo.weebly.com/uploads/1/3/0/7/130740441/lulogujal.pdfIn PDF document text
    • http://finonit.mypressonline.com/nuzalaxisarogisori.pdfIn PDF document text
    • http://menformula.xyz/norwegian_cruise_lines_stock_markety4cu4.pdfIn PDF document text
    • https://kowumawadixowiv.weebly.com/uploads/1/3/4/8/134888970/fepusanadikesup.pdfIn PDF document text
    • https://biwomewiwuxe.weebly.com/uploads/1/3/4/1/134131409/5b497.pdfIn PDF document text
    • http://mazers.fun/timex_indiglo_night_light_alarm_clock_manualbj8d0.pdfIn PDF document text
    • https://falatunasozenu.weebly.com/uploads/1/3/4/7/134762474/4851216.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/sisaxu/angry_baby_boy_images.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/42630943411.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/23300486161.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/11142650614.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/3d_decoupage_sheets_for_card_making_christmas.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/67268112870.pdfIn PDF document text
    • http://tiwatimab.atwebpages.com/55366748691.pdfIn PDF document text
    • http://tavoxelelenasi.onlinewebshop.net/can_you_charge_ps3_controller_with_wall_charger.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/emiway_songs_machayenge.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/8358340905.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/answer_sheet_1-_100.pdfIn PDF document text
    • http://xomapagovujux.atwebpages.com/zoninuwuvexudoligutinix.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/32919228884.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_off0000cfff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFFF 5576 bytes
SHA-256: d578208a3c009aad30a046c2ec3fe776c815039a717b7d6fb50df2c9613fddb8
font_01_sfnt_off0000e2eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EB 10180 bytes
SHA-256: 594b67cdc4cd843b0ed45cf018e4ffc95bb6b974a93f0f57b60ea1516d67b45f

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