Malicious PDF — malware analysis report

Static analysis result for SHA-256 f049e97e8033a63b…

MALICIOUS

PDF

101.7 KB Created: 2020-12-27 20:57:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 8f04ed75c3a869c9be71e8fe01546723 SHA-1: 406508f8b18c527b1f0c25c95f5344e2786bfc1a SHA-256: f049e97e8033a63b4e948212699b65cf88676264d55aacdd66b81c5540f0b9f8
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafffe.ru/strik?utm_term=up+first+podcast+hosts PDF link annotation
    • https://cdn.sqhk.co/nimawabej/ihajbge/ragdoll_throw_challenge.pdfIn PDF document text
    • https://tajuboramaze.weebly.com/uploads/1/3/4/5/134591815/daworazowinup.pdfIn PDF document text
    • https://soleduni.weebly.com/uploads/1/3/4/5/134581057/4b65d.pdfIn PDF document text
    • https://cdn.sqhk.co/jebixusugak/REq6JWZ/plants_vs_zombies_download_free_for_windows_7.pdfIn PDF document text
    • https://cdn.sqhk.co/duwewofowus/gvgd0jc/16283983680.pdfIn PDF document text
    • https://cdn.sqhk.co/zezoxomop/e8mhaS2/.pdfIn PDF document text
    • https://cdn.sqhk.co/jeposanop/fgjEicK/kivovav.pdfIn PDF document text
    • https://xilorufanil.weebly.com/uploads/1/3/0/7/130739938/2c49dab58f3e859.pdfIn PDF document text
    • https://wugebanog.weebly.com/uploads/1/3/4/7/134709888/xurugumuzimoma-wamovonori-mibojamoxorim-mevawuvajasow.pdfIn PDF document text
    • https://vamubediva.weebly.com/uploads/1/3/4/9/134901044/mewusugokolesedoxir.pdfIn PDF document text
    • https://mufudenufasos.weebly.com/uploads/1/3/4/4/134492520/5e8adaafa508da.pdfIn PDF document text
    • https://zofumevovuve.weebly.com/uploads/1/3/0/8/130874077/lipivamodawas.pdfIn PDF document text
    • https://cdn.sqhk.co/jozojijejip/RIG8jhd/katatabuniwifavezajizuf.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/659a1014-c650-47f0-976f-e13483b2bc6d/modelo_de_gagn_y_briggs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8e9293a-7180-4cc3-b9b6-af1c543cbf0f/doxen_chihuahua_mix.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_off00015464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15464 5204 bytes
SHA-256: a31ad7ac3efc5325aafc7f0132ff1aef6a6ea43015d2e71af57cd910ece46e61
font_01_sfnt_off00016618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16618 10584 bytes
SHA-256: cc2cf70c5fadffea1907a373da7179b7af1154fa0dd0a4a90919d4330c0e250d

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