Malicious PDF — malware analysis report

Static analysis result for SHA-256 66ee01ebf72d7c74…

MALICIOUS

PDF

81.6 KB Created: 2021-01-08 14:41:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: fb088746e6a69598fa425ead9908d8ba SHA-1: eabc8ac77adc5daf07dc237e69980f4cee9901c1 SHA-256: 66ee01ebf72d7c74f2667bf0c8d9d9b649401959f206c6024b56bde9ccafd975
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a phishing or redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards an attempt to lead the user to malicious content, likely hosted on one of the provided URLs.

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://trafffi.ru/123?utm_term=honeywell+quietcare+humidifier+filter PDF link annotation
    • https://cdn.sqhk.co/nalujujoso/hfjgidb/zojubapodo.pdfIn PDF document text
    • https://lipijubirenazob.weebly.com/uploads/1/3/4/7/134722159/govejefoxolitexajor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415950/normal_5f99608d5dbac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369310/normal_5f8858c083edf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368469/normal_5fc350568e4d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374851/normal_5fee1926355fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369498/normal_5f88c1db80f45.pdfIn PDF document text
    • https://cdn.sqhk.co/rilowikapaz/22Qei1D/water_physics_simulation_hack_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/wumigapinido/Zhjgegj/bailarin_super_ios.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/56dda251-fe4e-4dc6-bf82-ef2c57e0c9f4/sesame_chikki_calories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3169a2a9-6662-4b1d-b0f6-b59ab1b9f54a/gizogegat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f357d60-85c6-4f92-878a-e9da773e8d28/xikezirereralujobupiroto.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/carrier_air_conditioning_control_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55732b6b-65df-4ede-8eae-2a8bd36ad7fc/zewarejekarajizipi.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_off000101c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C4 5364 bytes
SHA-256: 5b90cd6b8fff72535b9b9404448b17c125e70330a082918da822edebd9c03dbe
font_01_sfnt_off000113eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113EB 10908 bytes
SHA-256: e13cca3d7645e5046ccc65b42ae7b05d0b3881efc4924804f569a1127c0ff391

Open this report in the interactive analyzer, or submit your own file for analysis.