Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f1cdd1427948847…

MALICIOUS

PDF

75.4 KB Created: 2020-11-14 03:24:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f7d40165a3c1f9753598a31a83cc1279 SHA-1: 9d332b8cd24118e8f7fd42f9098e8eacdc080c85 SHA-256: 7f1cdd142794884716a765ad7dc6a32bb1e9a12b038b6102e7011e4661f7428d
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 0.9998

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://trafficel.ru/123?utm_term=at+home+euthanasia+austin PDF link annotation
    • https://zedaluridafam.weebly.com/uploads/1/3/4/4/134464222/nimorotupexogo_mubodikisut_muguzabiv_remuvojefu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490366/normal_5fadfa01f343c.pdfIn PDF document text
    • https://tokuniti.weebly.com/uploads/1/3/4/3/134331772/4517033.pdfIn PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/zutogudupitolosuvire.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369315/normal_5f88ad3e74e12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450154/normal_5fa289e122f16.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/b30ecfe3-15eb-47bf-8a6f-04a46e139732/vasunofodofuxovex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd204108-9a8f-44be-9537-eaf52819802e/metformina_glibenclamida_500_mg_5_mg_plm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51800f58-45d8-490f-88e6-453a87b8e896/find_the_missing_number_in_the_proportion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bb59e9c-4aff-4677-a294-38aefa977d7c/napumipilag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdfe6683-c73b-427e-a043-c843b42a872b/77273421120.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE5D 4668 bytes
SHA-256: 9c51062f040c7f22bd24ded34a75a57aa692e13c0ea81102f77a61535386db95
font_01_sfnt_off0000ee0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0F 10912 bytes
SHA-256: bed261ea268f1c49fd030033b8ae8f769182a1237da59c51aee05e9d3e5c5280
font_02_sfnt_off00011346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11346 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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