Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ed1f9b3a26bc078…

MALICIOUS

PDF

78.6 KB Created: 2021-03-20 16:19:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 833f7649556fb30dde54491e850f6954 SHA-1: 5e53d62a5c8109133f1cbdebef8fdb5fb3421348 SHA-256: 1ed1f9b3a26bc0787c2fd6fbe033e8b6021dfa5116b0ef815cbdb080d44a41f5
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be a lure related to map printables. The presence of numerous external PDF links suggests an attempt to drive traffic to a link farm or phishing sites.

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
  • 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://dafemum.ru/wix?keyword=china+blank+map+printable In PDF document text
    • https://sexojeno.weebly.com/uploads/1/3/3/9/133997780/mukidoreli-bizitifizut-zokutaze-wujane.pdfIn PDF document text
    • https://debawusajatowi.weebly.com/uploads/1/3/4/7/134707072/vogixu-nojotetasugagib-nulapiwufadikim.pdfIn PDF document text
    • https://cdn.sqhk.co/rivinodati/hgja1bF/kafudavoruvixet.pdfIn PDF document text
    • https://cdn.sqhk.co/murofoli/jhhjhcB/97990512116.pdfIn PDF document text
    • https://nuduxojobiri.weebly.com/uploads/1/3/4/6/134629521/fixulaka-navafefekatima.pdfIn PDF document text
    • https://tomoniwibisuxis.weebly.com/uploads/1/3/5/9/135961627/rawalexesiku.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/jidosatikim/5588528173.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaabbf51-c438-466c-8743-b3122d97b2da/lifubegoputemun.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/summerslam_2017_results_bleacher_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/one_of_us_is_lying_cast_simon.pdfIn PDF document text
    • https://e5447efa-8854-4d04-834e-f0bbd7438c8b.filesusr.com/ugd/ac612b_a64037a3098843419090e5d58a71d98c.pdf?index=trueIn PDF document text
    • https://1cdd1dcb-54a5-4750-95ad-c4cce9a68cd1.filesusr.com/ugd/1e32c2_357050b47ef6466e80e658e9add8cadd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/android_development_language_share.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0de3496e-de59-490c-9151-ed0009e64d36/un_mundo_feliz.pdfIn PDF document text
    • https://b56e00ce-d729-42e9-814b-b9a4b194f5ba.filesusr.com/ugd/f6f93f_4d95d41d2ccc464cbf2be6a2441d09ee.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a623f50-0a2b-4301-a9cf-b5e4cf8bb0b7/is_it_hard_to_learn_r_programming.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/jitiror.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_off0000f892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF892 4988 bytes
SHA-256: 36e75ad33dd50393a57f67a53cd791bfefd79df1b8c9c9cb7e179e4d54e542cc
font_01_sfnt_off00010955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10955 10548 bytes
SHA-256: d8c64bbeb1cf67a9d28667c3eb3f650cb261a9eb256f9741597868aea772d4ac

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