Malicious PDF — malware analysis report

Static analysis result for SHA-256 78f82ff5aeef3ca5…

MALICIOUS

PDF

70.2 KB Created: 2021-02-14 13:14:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: aaa683c141a9416311a4f866f668cb60 SHA-1: dde4880e010c859e46c6fbd2a56301c032ec55c5 SHA-256: 78f82ff5aeef3ca52ac03a38cc303178a812ece8063a1bf5fdd77ca58257706a
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF link farm'. The primary URL points to a keyword-related page, suggesting a potential SEO manipulation or phishing lure. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. No scripts were extracted, but the presence of numerous external links indicates a likely attempt to redirect users to malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://druttle.ru/wix?keyword=1+on+1+sports+games+unblocked PDF link annotation
    • https://karoxenerom.weebly.com/uploads/1/3/0/7/130739074/3303647.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415930/normal_5ff1d77508445.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5fdb638949367.pdfIn PDF document text
    • https://vedalamiru.weebly.com/uploads/1/3/0/7/130776143/rifarokarap_lasojulafu_femuxol_tusaji.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393779/normal_5fe1f2096f7e3.pdfIn PDF document text
    • https://cdn.sqhk.co/mivijigonof/DwNMhgy/magic_rush_legendary_heroes_list.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462727/normal_5fcb65c065692.pdfIn PDF document text
    • https://cdn.sqhk.co/numavagoko/DIghvS7/jogoretu.pdfIn PDF document text
    • https://cdn.sqhk.co/fekawifen/hgZq3jc/nutatux.pdfIn PDF document text
    • https://lavozeto.weebly.com/uploads/1/3/0/7/130775819/pozum.pdfIn PDF document text
    • https://fejiwapofiji.weebly.com/uploads/1/3/4/6/134699364/rikoxis.pdfIn PDF document text
    • https://zuwukozoxuwiged.weebly.com/uploads/1/3/4/7/134713444/wiposesu-telapit.pdfIn PDF document text
    • https://xelopapet.weebly.com/uploads/1/3/0/7/130775154/3270a96e068f.pdfIn PDF document text
    • https://cdn.sqhk.co/tepikipo/aZ8fjc7/62295300581.pdfIn PDF document text
    • https://vidafipi.weebly.com/uploads/1/3/1/6/131636743/3185807.pdfIn PDF document text
    • https://serataxufo.weebly.com/uploads/1/3/1/6/131606193/pedifaduk.pdfIn PDF document text
    • https://lamamamim.weebly.com/uploads/1/3/1/6/131606140/2634542.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446782/normal_5ff1865c5be5a.pdfIn PDF document text
    • https://dumetokewip.weebly.com/uploads/1/3/4/3/134394823/cffa6da.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479917/normal_5ffdf1ae02ead.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d51d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD51D 5552 bytes
SHA-256: 4d2b5c384d0708c89d4128cd0e9b91dd0a41284b59bff891660af35fe39a419f
font_01_sfnt_off0000e7e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E5 10324 bytes
SHA-256: 029e22054c70d386941c97c1ad736e2f5d705654f6b4d265be8fa3f26181e0a8

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