Malicious PDF — malware analysis report

Static analysis result for SHA-256 786ffc401589218e…

MALICIOUS

PDF

94.6 KB Created: 2021-03-18 05:24:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 6bb55fef92b40a6996bc7e189448be67 SHA-1: 2d5730985d3a870f56a642faf405431018b71408 SHA-256: 786ffc401589218e8aef51f02cde1a942a1462d394735a0238e4b5991b9e11da
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating a phishing attempt to trick users into visiting a malicious site. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be related to installation instructions, likely a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/strik?utm_term=avital+4103+remote+start+installation+instructions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4461484/normal_6013ed112c66c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413866/normal_5fc92b3bc4451.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428054/normal_5fe9d66a6a1f0.pdfIn PDF document text
    • https://jofarubosokiwa.weebly.com/uploads/1/3/5/3/135308863/gorivu.pdfIn PDF document text
    • https://kemiponoza.weebly.com/uploads/1/3/4/6/134605011/759377.pdfIn PDF document text
    • https://rewesiriwo.weebly.com/uploads/1/3/4/3/134318955/9756770.pdfIn PDF document text
    • http://migevus.iblogger.org/73681725102.pdfIn PDF document text
    • https://jubitire.weebly.com/uploads/1/3/4/0/134017652/durenaduz.pdfIn PDF document text
    • http://radogomi.mygamesonline.org/pavububoxojulapowidokugaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465006/normal_6029d76d5dbb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413118/normal_60501633c7a6a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481162/normal_5ffb0b6fe52fc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wupeguliv.epizy.com/bekazevezawufiratubo.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/3469357481.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/what_is_the_latest_news_in_the_philippines.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/burp_suite_professional_edition.pdfIn PDF document text
    • http://rexefobixavater.myartsonline.com/how_to_calculate_volume_in_liters_from_inches.pdfIn PDF document text
    • http://poruzimikipazan.epizy.com/ambalapuzha_kadavil_vacho_video_song.pdfIn PDF document text
    • http://luwawabegopit.rf.gd/triptico_de_acoso_escolar.pdfIn PDF document text
    • http://fuxunowelujuxa.atwebpages.com/58419856526.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/armed_heist_apk_data_mod.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011ad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD5 5440 bytes
SHA-256: 9b08b8d9b6551ca4308a338fe577f408566448be62f0088f8088a6296783dc22
font_01_sfnt_off00012d52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D52 11600 bytes
SHA-256: 7b728596b954383cc16bba5f667f87b9f738e2be0403a2e861508b30c24843be
font_02_sfnt_off00015502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15502 16120 bytes
SHA-256: 19190d97dee9bb0452e1cdb5c6d532847d24bbad987e6852a57e26c9a616033f

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