Malicious PDF — malware analysis report

Static analysis result for SHA-256 87b8e4a524d85bf1…

MALICIOUS

PDF

65.7 KB Created: 2020-11-23 06:35:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: e2bd913a3c21324025223af0a1f1f20e SHA-1: 1ca8825c3f2577cbabeaf285fbd916d4c5b036b8 SHA-256: 87b8e4a524d85bf1227f9a63d55fe4113aac4df3fc7e67e21370a4089245820e
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it is a malicious phishing document and a link farm. It embeds external URIs, with one prominent URL pointing to 'traffking.ru', suggesting a redirection to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffking.ru/aws?utm_term=modem+technicolor+tc8305c+manual+espa%25C3%25B1ol PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419441/normal_5fa2383b15753.pdfIn PDF document text
    • https://bafalado.weebly.com/uploads/1/3/4/8/134865771/9968884.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420587/normal_5fab8df761fc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404738/normal_5f91c5249329e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384819/normal_5fa50b21ad6c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427313/normal_5f9ff012139f8.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/b6e2db5b-7a4f-4174-b2ef-404e2a102313/52696240437.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f09dffb-9585-430c-a0e5-99bec90cf53d/midawawopivinizuvuxagoboj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b12cebf-f016-4000-aec3-9d3615d078d5/pomorox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/683896a6-406d-4e12-82cd-422b910a626a/28421967026.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8e40b45-9045-4c56-9c7b-fc823c6a00ec/43931291638.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3ff89ba-9fde-454e-a882-8ec02eeb7f1b/56254601504.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b25c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB25C 6036 bytes
SHA-256: 5210ce10a7292db1304b550eb83efc7d8812ef8537cc4d4bf43cac817cc8a814
font_01_sfnt_off0000c674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC674 10292 bytes
SHA-256: 3792dbc6280c5f4c7563266f3b5350746c374fcfbef19bcc9dfbc4e81a907797
font_02_sfnt_off0000e97e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97E 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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