Malicious PDF — malware analysis report

Static analysis result for SHA-256 80d8ace47da3dbce…

MALICIOUS

PDF

78.9 KB Created: 2021-03-29 21:47:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a3eb395a9f0434e3abe1d8865383d042 SHA-1: 55885834d275e73f1619d8d508e9d7ebf0687737 SHA-256: 80d8ace47da3dbce80c356a2e203d4a1ef93f0617b3b360ada92818fd7f74fe5
104 Risk Score

Malware Insights

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

The file is identified as malicious by a machine learning classifier and ClamAV, with a high-risk score. It contains an embedded URI pointing to 'resalured.ru', which is likely part of a phishing or malware delivery scheme. The PDF structure includes an AcroForm button with an action trigger, suggesting interactive elements designed to lead the user to the malicious URL.

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
  • AcroForm button with action trigger low PDF_ACROFORM_BUTTON
    PDF contains a /Btn form field together with a SubmitForm/URI/Launch/JS trigger — this is the building block of fake 'Download' or 'Open' button overlays used in PDF phishing lures
  • 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://resalured.ru/wix?keyword=hit+refresh+satya+nadella+pdf PDF link annotation
    • https://lonamoki.weebly.com/uploads/1/3/5/9/135964194/fusajow.pdfIn PDF document text
    • https://dijujuvosidig.weebly.com/uploads/1/3/0/8/130873718/rixigubosaniku-lotidugolisiri-nabafor.pdfIn PDF document text
    • http://juzezudusota.mypressonline.com/16735167487.pdfIn PDF document text
    • https://cdn.sqhk.co/vimexuda/ehjifgS/41148_walkthrough_episode_3.pdfIn PDF document text
    • http://zatoboyvibor.fun/latest_telugu_love_bgm_ringtones6bboh.pdfIn PDF document text
    • https://fularoxu.weebly.com/uploads/1/3/1/4/131452806/tubopa.pdfIn PDF document text
    • http://fruits-summer.fun/20662257854p37a4.pdfIn PDF document text
    • https://vudemigubujesi.weebly.com/uploads/1/3/5/3/135300151/04b49.pdfIn PDF document text
    • http://bixaxivajujojar.mypressonline.com/command_prompt_commands_free_download.pdfIn PDF document text
    • http://zagodutaf.getenjoyment.net/homelessness_in_los_angeles.pdfIn PDF document text
    • https://taduvovu.weebly.com/uploads/1/3/1/8/131871704/ec4d681684d.pdfIn PDF document text
    • https://cdn.sqhk.co/givifevulo/ie4CgKG/alto_s_adventure_wingsuit_how_to_use.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/ximupuv/lutepaxizutu.pdfIn PDF document text
    • http://vuzuwukef.atwebpages.com/how_many_quarts_of_oil_does_a_scag_turf_tiger_take.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/81167630620.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/8278551884.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/zufegufenagumudomumar.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_off0000f59d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59D 5192 bytes
SHA-256: 44145737c9810a0d54cb13700c2013128e7224f3edfb1c02f0b1edf5c31371c2
font_01_sfnt_off00010747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10747 10888 bytes
SHA-256: 5cb011b7fec2abd8c8662ccadfc4c0f80af3b1b1541898a4210ee6fe66fc5dbf

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