Malicious PDF — malware analysis report

Static analysis result for SHA-256 97f6643827cd72ae…

MALICIOUS

PDF

67.7 KB Created: 2021-02-15 17:04:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c841e47bf3029e9c4551ab832885b263 SHA-1: 136b8325e964b58a5bb9d03d03b31e4c9326edfc SHA-256: 97f6643827cd72ae24b8cdd99b12a9bb30ec3cd760bd93cad7782f6e09221863
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 identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body is heavily obfuscated and appears to be junk data, but the presence of numerous external links suggests a phishing or malware distribution attempt, likely initiated via spearphishing.

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://crophysi.ru/strik?utm_term=zebco+slingshot+20+parts In PDF document text
    • https://static.s123-cdn-static.com/uploads/4387417/normal_6001e31a0ca35.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382790/normal_5fc8301233596.pdfIn PDF document text
    • http://stixlife.info/logic_under_pressure_mp3_download_frn9ht2.pdfIn PDF document text
    • https://vogifidawavuda.weebly.com/uploads/1/3/1/6/131636702/sowuzuloz-fivimazewipuga-migewikezonopov.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480728/normal_5ffebec996fbc.pdfIn PDF document text
    • http://nukuxarigikuxez.iblogger.org/lalaranuza.pdfIn PDF document text
    • https://fuxovibafisiboj.weebly.com/uploads/1/3/0/8/130874455/95de87d8bfbc1d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417531/normal_5fcbd67743144.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369182/normal_6020871b45a37.pdfIn PDF document text
    • https://sizeduxaginota.weebly.com/uploads/1/3/2/7/132712537/3330161.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491173/normal_60246647569b5.pdfIn PDF document text
    • https://lononefebodamu.weebly.com/uploads/1/3/2/6/132696526/6727336.pdfIn PDF document text
    • http://verifybadgehelp.com/microsoft_excel_step_by_step_training_for_beginnersp9rsv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fopugaxug.rf.gd/harvard_mba_employment_report.pdfIn PDF document text
    • http://jiwepatifon.rf.gd/xurabodopegojat.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB85 5564 bytes
SHA-256: 3212b3d273ab259203e3b96765cd217dd77e80815d71c3a0c8e1c380674a6617
font_01_sfnt_off0000de6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE6A 10916 bytes
SHA-256: d0682a2107397ff4d50f33e475bc4d90057d8e6399057137ee2e1a8be61e475d

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