Malicious PDF — malware analysis report

Static analysis result for SHA-256 acb274cd16de18eb…

MALICIOUS

PDF

71.6 KB Created: 2021-02-18 05:03:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 52bbdff369e8af9f5879b731510b448c SHA-1: 1e30184c4e4ed311e0e8160cb5fda1b1e1e47c37 SHA-256: acb274cd16de18eb3f7174007736188f62646e392716882ad4dffbaa19e8c95d
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting an attempt to manipulate search engine results or redirect users to malicious sites. The presence of an embedded URL and the ClamAV detection as 'Pdf.Phishing.Trojan' further support a malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://maypoin.ru/wix?keyword=choices+hack+apk+ios PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368751/normal_5ff7e76f4528d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392462/normal_5fca424020441.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463034/normal_5fd2f576779b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383925/normal_5ffd9917add98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367646/normal_6009cd21919a1.pdfIn PDF document text
    • https://vufosaxirit.weebly.com/uploads/1/3/4/0/134018891/pujosagu-silog-votumazo-lolatone.pdfIn PDF document text
    • https://fekanarikivokil.weebly.com/uploads/1/3/4/8/134884633/4326626.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455198/normal_5ff6521633a52.pdfIn PDF document text
    • https://wipukanutunuk.weebly.com/uploads/1/3/1/4/131437017/xatokuwosutuv-megikibuvuv-vilemoburujuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377391/normal_601cec902bbf6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447097/normal_5fcc7ef59df57.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://koburolamugalo.rf.gd/what_is_a_shadow_work_journal.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/vuxemerewigarorasumeli.pdfIn PDF document text
    • http://buwobazakosujo.rf.gd/9130953071.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/abbyy_lingvo_x3.pdfIn PDF document text
    • http://lafatakijuton.epizy.com/81109265808.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_off0000dde4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE4 4860 bytes
SHA-256: 399917492a9e569479a3bc69e034c9db4b9b64f6550dbe8672f0bd2f6c068671
font_01_sfnt_off0000ee6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6B 10360 bytes
SHA-256: ab91cef582e38b5acde0a34beacdd3dabf06b5a170848708e25897f14a03cd49

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