Malicious PDF — malware analysis report

Static analysis result for SHA-256 d48466c2b6ad0cc5…

MALICIOUS

PDF

67.2 KB Created: 2020-11-18 23:42:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 47f563f69e07f883b2c685f8507ba1fa SHA-1: 97d1fb4c30f4e443a06b049e84fb7dbdf54d8af3 SHA-256: d48466c2b6ad0cc5bd71cf43537ccdbb338b99bf093eee359614967ce4d09e97
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to S3 buckets, suggesting a link farm or distribution mechanism. The primary URL, https://traffset.ru/123?utm_term=types+of+rocks+worksheet+printable, is likely a lure to download further malicious content. ClamAV and ML heuristics confirm the malicious nature of the PDF, classifying it as a phishing trojan.

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://traffset.ru/123?utm_term=types+of+rocks+worksheet+printable PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4488604/normal_5fa85982cc62a.pdfIn PDF document text
    • https://dakitejowavuri.weebly.com/uploads/1/3/4/6/134669034/janebuxasizi-kujazuv-dewonawogidu.pdfIn PDF document text
    • https://ladetizor.weebly.com/uploads/1/3/4/7/134731735/dufigemofelebudesa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fovezewi/33939442698.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/boond_boond_video_song_3gp.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/15372029374.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/compatibility_numerology_report.pdfIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/python_string_format_0_padding.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/weslo_momentum_g_3.2_elliptical_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e1b9ae7-00ef-4079-a9ae-21716f7c5d82/89406319564.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/windows_7_oem_activator.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_off0000c92c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC92C 5452 bytes
SHA-256: 06f171a00291065a8b61e7c3a622ee075d80905c3a23e09077c604e5e6eb57d0
font_01_sfnt_off0000dbcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCB 10512 bytes
SHA-256: 5bc7e50f7b44dce3b2c7bda15a53b7a4381223be792677d92f3eaee94fad2551