Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8f9ee0c6f279230…

MALICIOUS

PDF

76.4 KB Created: 2020-11-21 14:56:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 71add09a712f162dbc2d00d9de9c177f SHA-1: dfb778925c30921dc6eb01b3013917b3f89671cd SHA-256: d8f9ee0c6f27923011fc65d55fde8a0b71f7e9af9ace7cf112cad8a5cc8d4f51
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/123?utm_term=minecraft+black+cat+summon PDF link annotation
    • https://pafovawulawagi.weebly.com/uploads/1/3/4/5/134581771/kasajuweb-rukonulijel-jozaw-buzag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393521/normal_5f90c4a22017b.pdfIn PDF document text
    • https://dafalozurevibi.weebly.com/uploads/1/3/4/3/134308304/5426623.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379744/normal_5f9b0c6426d9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420587/normal_5fa324f33f17d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401973/normal_5f924731edda7.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/3e75a4e696b2f2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368971/normal_5f87eeb7d21b7.pdfIn PDF document text
    • https://bevevigulamop.weebly.com/uploads/1/3/4/7/134759368/5553838.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403128/normal_5fa9d5771c2e3.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/8321e7de-7148-477a-89a8-472da2abe097/zilumorexeberewagot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8f92aa0-ae6a-4261-9605-5cc068dcb6d6/wow_classic_zg_raid_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f451811-5033-492f-9306-019f8f7c8e08/shin_chan_torrent.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcddf7ad-ec68-486b-bcb6-3343067b77b7/panasonic_tc_p50vt25.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b28a40c6-b1d9-40a8-844d-4a3859a9df08/89369885528.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_off0000ee5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5B 5236 bytes
SHA-256: 08c91724081a46200203192b93cdf4e750c9fc9e7586a8cbae86d6b57fa42e30
font_01_sfnt_off00010025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10025 10656 bytes
SHA-256: 3a8187909af0872c9398f0f63071885c8a418e0d22a8b319986ea7e13765ca8c

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