Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e1690e5efe6190f…

MALICIOUS

PDF

70.0 KB Created: 2021-02-04 13:39:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 2acfbb293982824e803e1cb3ac6863d8 SHA-1: a710a24a4abc638cdc09ed85e64d7f84d6bb6a54 SHA-256: 0e1690e5efe6190f09b6eabd6f2fb911599e82b3106832a4fd2184faa05e44df
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to S3 buckets, suggesting a link farm or SEO poisoning attempt. One prominent URL, 'https://leonvi.ru/aws?utm_term=annabelle+trailer++free', indicates a lure related to 'Annabelle trailer free'. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were directly extracted, the PDF structure and numerous external links are indicative of a malicious campaign, likely phishing or scam-related.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/aws?utm_term=annabelle+trailer++free PDF link annotation
    • https://wojaginobaxap.weebly.com/uploads/1/3/1/8/131857211/6164535.pdfIn PDF document text
    • https://xemizumelisiga.weebly.com/uploads/1/3/1/8/131856695/3543926.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379611/normal_60128832630e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448976/normal_5fd15a0a8a765.pdfIn PDF document text
    • https://tudegikugil.weebly.com/uploads/1/3/5/3/135317618/734a87a862e0c.pdfIn PDF document text
    • https://tetemubegogik.weebly.com/uploads/1/3/4/4/134443084/jimederuto_kebizuj_juxexaguwulib.pdfIn PDF document text
    • https://lazekikobetilof.weebly.com/uploads/1/3/4/4/134443651/sokamerekifudo-negipimesuvil-desokuwepo-sekifatamazefu.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/vebisop/65614717896.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/creative_agency_capabilities_deck.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/29662172878.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/87477316507.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/white_crepe_paper_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/lunavikoxolopabaxekameve.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/pomunasasat.pdfIn PDF document text
    • https://s3.amazonaws.com/padanivozeb/10878406726.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/congruence_and_similarity_worksheet_tes.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_off0000d900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD900 4712 bytes
SHA-256: 46d7d53754c31f003c7d59c24ba51915cc191947f388a5d602e61b7810c2dab6
font_01_sfnt_off0000e917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE917 10024 bytes
SHA-256: 7541f1b7e494ec11cc763b848543fc177a6f1db9d93703760b36a379831a07db

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