Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e920b23125a7312…

MALICIOUS

PDF

78.6 KB Created: 2021-03-11 16:45:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 75003f9edc46694c278eb710b00051c2 SHA-1: 5afe79218185dfd1c84318242a4bd16df1da972a SHA-256: 1e920b23125a7312ecd713d788621be6018f817cd0c55f8708b90eda1e98152b
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://fokemale.ru/award?keyword=free+tree+house+building+plans+pdf PDF link annotation
    • https://vuxidozeni.weebly.com/uploads/1/3/4/6/134669409/wijuram-kavet-pojegoz.pdfIn PDF document text
    • https://nerupeke.weebly.com/uploads/1/3/1/4/131483009/gevimozumimet.pdfIn PDF document text
    • http://sudilufib.getenjoyment.net/26957345204.pdfIn PDF document text
    • https://wumifidadorubip.weebly.com/uploads/1/3/5/2/135298964/490dd232.pdfIn PDF document text
    • http://doporujela.iblogger.org/89982479726.pdfIn PDF document text
    • http://nigemutekilum.mypressonline.com/pidesusozujifiragi.pdfIn PDF document text
    • https://gumopaxegekugod.weebly.com/uploads/1/3/4/0/134018731/e2cbd57c71a877.pdfIn PDF document text
    • http://vatidenow.medianewsonline.com/overeaters_anonymous_12_step_book.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2903667b-e544-4972-ac7f-e5855aaa9b37.filesusr.com/ugd/2cc660_3c74245584544d1db635360d202dc4dd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/xapufipazenokuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47e77a20-8505-4421-8da2-e2f900f985e9/can_you_plead_nolo_on_a_felony_in_ga.pdfIn PDF document text
    • https://eb40363d-1d1f-4170-a897-f23f0f433116.filesusr.com/ugd/2a1429_2595985ddcff42b2aabfad26bed19713.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/52ef04ce-ce2a-4cd3-93a1-41775d63f770/oregon_scientific_thermo_sensor_manual.pdfIn PDF document text
    • https://7e70056c-c2aa-4e53-98c5-50750123c107.filesusr.com/ugd/f8ae5d_89d4e75ac2214311aa69d1c74db25560.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zinudipir/wahl_pet_clippers_target.pdfIn PDF document text
    • http://naxaroxabim.rf.gd/the_lightning_thief_chapter_11_read_aloud.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_off0000f79a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79A 5400 bytes
SHA-256: b320f7f9c65d657918dca5e67d8c44c53e3f2ae66d8f64b26dcfc1b7805d67e3
font_01_sfnt_off000109ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109EC 10412 bytes
SHA-256: 879f72aa17607413084cf8bcd77bdeb3f01fd0708da037731cc5e21a7095d2b4

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