Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f8869acff505ebb…

MALICIOUS

PDF

72.5 KB Created: 2021-06-05 01:34:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7c038175b5b316fb8417a31d8bf1a931 SHA-1: 8e9b7cff2a5b37ef74ec6ef12f22d43b11505d0a SHA-256: 0f8869acff505ebbd14458c3aad4c395f8188a0ac2181811e060357043805a2e
156 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 0.9993

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://oniceh.ru/pbw?utm_term=how+to+make+pie+filling+with+instant+pudding PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4456982/normal_5ff8db99a63fd.pdfIn PDF document text
    • https://webonuru.weebly.com/uploads/1/3/1/4/131437172/4851367.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371543/normal_60217874e45e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369632/normal_601ff3472d378.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473039/normal_60297f805e27c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470211/normal_5fe572f2e1b3e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428043/normal_5fcf6c060bb0e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410020/normal_6000203f5c135.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375696/normal_5fc8445289948.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403940/normal_60044dc7ab295.pdfIn PDF document text
    • https://zegaturivelegob.weebly.com/uploads/1/3/1/4/131437779/5d2f15dfd.pdfIn PDF document text
    • https://jedadizonavo.weebly.com/uploads/1/3/4/7/134721040/lugatazoxixiw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413011/normal_5fc71aa82f1b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417995/normal_606d3b42865ef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vananizi.pbworks.com/f/vafojukikinotomesanukuvof.pdfIn PDF document text
    • http://nunaruribeg.pbworks.com/f/famakasuvotodibolu.pdfIn PDF document text
    • http://jajafad.pbworks.com/f/geluxer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee1f6cc6-7059-4eef-9219-5a01aa954dfd/how_do_i_check_the_accuracy_of_my_oven_temperature.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89973698-bf7c-456a-ab8d-f1169b66fbe1/kodak_esp_3250_driver_is_unavailable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bd4f682-3c34-450a-978b-d4ffe9463800/dirifovujuzosilemurixiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c34568bf-adc9-4951-9b43-041b1e25aaa7/42717732671.pdfIn PDF document text
    • http://pokuwatosat.pbworks.com/w/file/fetch/144555825/free_printable_flower_templates_online.pdfIn PDF document text
    • http://bukafag.pbworks.com/f/dokuretedanipowane.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_off0000dbb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB1 5476 bytes
SHA-256: 40772d94108636f7f02b3326881e092d0c4fffb538d1044498744672352353a4
font_01_sfnt_off0000ee3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3E 11164 bytes
SHA-256: 65a8059978ce0241c5dd81d068f6f60aafa29a80750b78b45325fc6e1c181c0f

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