Malicious PDF — malware analysis report

Static analysis result for SHA-256 a313679a4e354c73…

MALICIOUS

PDF

77.3 KB Created: 2021-02-26 11:43:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1c590947c6afed5a04e0acfe5d239c4c SHA-1: baaad7a6a3a4a2c0e7190ae87b37bdb19ee8df67 SHA-256: a313679a4e354c734059c85ac4ae5e69a34a4b1cf41c6018899e57ea2eabb37a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier with high confidence. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One prominent URL, 'https://ponafet.ru/wix?keyword=download+mspy+free+trial+apk', indicates a potential lure for downloading software. The presence of embedded JavaScript, though not fully detailed, combined with the overall structure, suggests an attempt to exploit PDF vulnerabilities or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ponafet.ru/wix?keyword=download+mspy+free+trial+apk PDF link annotation
    • http://xufamorazogubov.sportsontheweb.net/what_is_the_difference_between_adobe_acrobat_dc_and_pro.pdfIn PDF document text
    • http://texno3ua.com/summary_of_adventures_of_tom_sawyer_chapter_1_to_109i6lf.pdfIn PDF document text
    • https://wisolowiguwo.weebly.com/uploads/1/3/4/6/134630140/9e4a84536.pdfIn PDF document text
    • http://svoytrylend.xyz/wingsuit_flying_through_holeyuznq.pdfIn PDF document text
    • https://dataremidesop.weebly.com/uploads/1/3/4/6/134697992/susubewusud.pdfIn PDF document text
    • http://detonicro.website/zinudenoledepurekeijhr5.pdfIn PDF document text
    • http://idem-peshkom.ru/wulufaf8xtvn.pdfIn PDF document text
    • https://vumirexow.weebly.com/uploads/1/3/2/7/132740730/c499ceb.pdfIn PDF document text
    • http://muzibatixabu.mypressonline.com/jofotiliwesajivu.pdfIn PDF document text
    • https://gifolavetufo.weebly.com/uploads/1/3/2/6/132695571/nosuzewuwibize_nevusuwosaz_wukitalu_beketexofefijo.pdfIn PDF document text
    • https://fijapirugonobi.weebly.com/uploads/1/3/4/3/134315317/d5e0ab5ec1.pdfIn PDF document text
    • https://wewiloviwa.weebly.com/uploads/1/3/4/5/134585183/0ea1c89cf81236c.pdfIn PDF document text
    • http://rabota-plus.club/92135853114yl0or.pdfIn PDF document text
    • http://speak4pro.com/songs_chords_guitar2jvio.pdfIn PDF document text
    • http://mon-cmb.best/tetoxtqiao.pdfIn PDF document text
    • http://re-capital.ru/66233752479yl1ki.pdfIn PDF document text
    • https://bumeguzi.weebly.com/uploads/1/3/5/3/135391430/zuvamalapefixu.pdfIn PDF document text
    • https://xunerekube.weebly.com/uploads/1/3/0/7/130739532/liguxijunupusukupug.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/kujesulad/76936883899.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/powerpoint_animated_icons_free.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/negative_effects_school_uniforms.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_off0000f0d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D1 5444 bytes
SHA-256: 806824c86d466e934d98602c42ff8173c33b160035485a1e95b9b94371d52804
font_01_sfnt_off00010362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10362 10644 bytes
SHA-256: d43f777fad6b75d907a927d3b29ce9259ddf43c5793cec3b215dfbbc8c8f95a4