Malicious PDF — malware analysis report

Static analysis result for SHA-256 393fd771dff0b53a…

MALICIOUS

PDF

131.1 KB Created: 2021-01-05 20:17:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7032eb838452c07ccdcf623dcb0ee9ab SHA-1: d0addb35628a449145319934b26afcc428aa8ff5 SHA-256: 393fd771dff0b53a5d42b6ced5d315c1336d19f7dee215203555633b29fa339f
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are part of a link farm designed for SEO manipulation. The primary link directs to 'ggtraff.ru', a known malicious redirector, and the ClamAV detection indicates this is a phishing trojan. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf and references 'Fallout 76 all tadpole exam answers', likely a lure to attract clicks to the malicious URLs.

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
  • 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.
  • 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.
  • 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://ggtraff.ru/aws?utm_term=fallout+76+all+tadpole+exam+answers In PDF document text
    • https://ragidogatekanex.weebly.com/uploads/1/3/4/3/134388076/wotutoziwuwe_karosoxebu_zodirubukilewam_febikin.pdfIn PDF document text
    • https://cdn.sqhk.co/munoforifuso/cBgihbM/16739463951.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/wukipotopawomon_lifasi_kutapitu_zubade.pdfIn PDF document text
    • https://cdn.sqhk.co/xasakeza/hijcTaq/friends_tv_hd_wallpaper_download.pdfIn PDF document text
    • https://xukusoresi.weebly.com/uploads/1/3/4/4/134488105/doluvibatuziw.pdfIn PDF document text
    • https://wagimudo.weebly.com/uploads/1/3/4/4/134475497/8821808.pdfIn PDF document text
    • https://merejeweja.weebly.com/uploads/1/3/1/3/131381112/2ec03cee935.pdfIn PDF document text
    • https://cdn.sqhk.co/boxokozofe/Xjai27W/tool_kit_for_car_trunk.pdfIn PDF document text
    • https://nijasofefovo.weebly.com/uploads/1/3/4/7/134719995/3535290.pdfIn PDF document text
    • https://cdn.sqhk.co/xonoguduzob/eidqhiA/gufizaxetipesola.pdfIn PDF document text
    • https://joripirido.weebly.com/uploads/1/3/0/7/130776040/820553.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/vasofirida/25358821483.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/usher_syndrome_type_2_genereviews.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/40017237944.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/jezekake.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/27567167564.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/80643113194.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_off0001c628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C628 5452 bytes
SHA-256: 71f80c116338e93f1c1b38c7672e5041b2109dec0444978a3e0f7cd5cabcb477
font_01_sfnt_off0001d8bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D8BC 11132 bytes
SHA-256: 3c3c9e0866e27c3f1ffcbea3d80af745071735c06e06fd0a1a2343424a0cc686

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