Malicious PDF — malware analysis report

Static analysis result for SHA-256 86a99e26c7f7c1f3…

MALICIOUS

PDF

74.6 KB Created: 2021-02-20 15:28:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e77440c937fbbb257e285d418f071997 SHA-1: 9346fbef7ee3980b9e6b02111b0ba5ac7d084fef SHA-256: 86a99e26c7f7c1f3eaf5b8e81c521ae0be878344a3b40d2da64927bb80073b20
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, suggesting it is part of an SEO spam or phishing campaign designed to drive traffic to malicious sites. The embedded URLs point to various domains, including those hosted on platforms like weebly.com and cdn.sqhk.co, which are often used to host malicious content.

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
  • 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://baarspo.ru/strik?utm_term=how+long+does+it+take+to+smoke+a+pork+loin+on+a+traeger PDF link annotation
    • https://cdn.sqhk.co/sativomofij/gdfvDgi/85512396200.pdfIn PDF document text
    • https://cdn.sqhk.co/xegapanasa/Mjfidic/11787534751.pdfIn PDF document text
    • https://rexaririwe.weebly.com/uploads/1/3/1/6/131637114/fexevonuj_fefagogat.pdfIn PDF document text
    • https://cdn.sqhk.co/bezupidokaz/ghgrrjb/sling_drift_mod_apk_vip.pdfIn PDF document text
    • https://cdn.sqhk.co/rivogigaweb/piiibFq/fold_up_table_and_chairs_set.pdfIn PDF document text
    • https://cdn.sqhk.co/lojosewude/Cojgcmn/vedigogot.pdfIn PDF document text
    • https://besusawoses.weebly.com/uploads/1/3/5/3/135318815/kowadafefo_kokixawuliki.pdfIn PDF document text
    • https://fatatarulawug.weebly.com/uploads/1/3/4/4/134474158/8790637.pdfIn PDF document text
    • https://mevavenepid.weebly.com/uploads/1/3/1/6/131637679/gebuzadigof.pdfIn PDF document text
    • https://cdn.sqhk.co/rafumufo/hh9OYup/7635381348.pdfIn PDF document text
    • https://cdn.sqhk.co/narulaloro/jbhayzT/sakura_school_simulator_update_terbaru_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426814/normal_6017c0b6dbc6f.pdfIn PDF document text
    • https://bezofaxifi.weebly.com/uploads/1/3/1/6/131606652/nubama-buvin.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_off0000e56e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56E 5396 bytes
SHA-256: 5f1056bd209f6b1730cdc7a2761d980aecb99b47b1e29fc310f1c934552e1e94
font_01_sfnt_off0000f7c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C9 10804 bytes
SHA-256: d8ab570edd138cd881941cbeb3feed5c988cd3436cdcb281e50fdea1150848b0

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