Malicious PDF — malware analysis report

Static analysis result for SHA-256 b46c67e7d03b27a1…

MALICIOUS

PDF

80.7 KB Created: 2021-03-15 12:43:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d43e02d8ee884f52af8758b0732bcec3 SHA-1: 9417017917370c6ad158a51d725969a902d9ce61 SHA-256: b46c67e7d03b27a1d52e4f3d333dc94ad1e2023e8cd54fe23a8488d7e60d512f
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_LINK_FARM' indicates a high volume of links designed to manipulate search engine results or direct users to malicious sites. While no scripts were explicitly extracted, the presence of external URIs and the ML classification strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://gimoguvi.ru/123?utm_term=ebook+belajar+bahasa+korea+pdf PDF link annotation
    • https://cdn.sqhk.co/rotonoba/aBziJRv/world_war_3_news_today_in_tamil.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxeromewime/ggijAjd/29641430875.pdfIn PDF document text
    • https://cdn.sqhk.co/xonipavu/aEtjgjj/zara_larsson_lush_life_just_dance.pdfIn PDF document text
    • https://cdn.sqhk.co/devurekon/iihggjf/vukusinomokinireled.pdfIn PDF document text
    • http://lejifip.sportsontheweb.net/barubazop.pdfIn PDF document text
    • http://pavawafupef.66ghz.com/is_python_a_good_language_to_learn_reddit.pdfIn PDF document text
    • https://cdn.sqhk.co/xurinuwame/hjji52N/gavekurubujusadafumakuza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xofisoroj.rf.gd/fipilejonanubovi.pdfIn PDF document text
    • https://f37c3615-20b0-4e70-b1e7-2acf34113780.filesusr.com/ugd/1e533a_e38fe9261f904cb3bffc47ebfc2cec3e.pdf?index=trueIn PDF document text
    • https://78fa80b2-8629-447b-ad63-53e91e8d4948.filesusr.com/ugd/8f02de_e99beb0046dc4298a29f3d1cdb747e07.pdf?index=trueIn PDF document text
    • http://pogetowem.onlinewebshop.net/79418929222.pdfIn PDF document text
    • https://06ebba1c-c738-45d4-b58d-83edbdcc9420.filesusr.com/ugd/b14caa_06ce657dc6114c49a0e23dde0981ab69.pdf?index=trueIn PDF document text
    • http://tezadoni.rf.gd/fidafafa.pdfIn PDF document text
    • https://7ef5d8b8-74ac-4e0a-b0a0-fa61ca6462a8.filesusr.com/ugd/23e9be_23d0397b843148cc8a10a1c9566f7752.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/caaf9825-d34e-4ae8-bc5b-a31a80c48032/fender_champion_40_review_ultimate_guitar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04809ce0-e2e7-490d-ad94-a6c0705ee9de/kekopir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa53c125-ab6e-49b6-a07a-2c65e124dbe2/human_body_systems_and_their_functions.pdfIn PDF document text
    • http://kisezemewarajox.rf.gd/salodutimigoragenete.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8fa395a-94ae-430e-87e3-5d71ade32271/14135821939.pdfIn PDF document text
    • https://50aad03f-9d2a-47e6-be13-abd12f321b17.filesusr.com/ugd/3fd638_943c8cb0154542b8b59843b447e161c3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/47717f0d-8515-45b0-a21f-1d994701476e/memekokezeva.pdfIn PDF document text
    • https://bb55feb6-a0c4-48ae-8f72-aea2c45912f8.filesusr.com/ugd/b9801a_1fbbd2b468a4491090dbaddbf3408a6b.pdf?index=trueIn PDF document text
    • https://aa5f33e9-793b-4807-a257-9eac84d314d0.filesusr.com/ugd/aa57b2_d020de202a054fda80cbb222843c488f.pdf?index=trueIn PDF document text
    • https://ca30e0e0-ecf2-44ab-b6a2-fe26291458be.filesusr.com/ugd/34e21e_905afaa76c1a45e085cb8c6debe8f391.pdf?index=trueIn PDF document text
    • https://989eff4c-946f-4221-9817-1a8d60f2082d.filesusr.com/ugd/7edf14_f6909d47d20b46afac12a5f2049bc7b7.pdf?index=trueIn 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_off0000f078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF078 3740 bytes
SHA-256: 7e6a91e46e5dc925a43826e3685e4e5e8d56e7c2ac1fc2d4c09201e25c9a0d36
font_01_sfnt_off0000fdcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCD 5364 bytes
SHA-256: d18a470fd11b8c81c99a5308b0e6415d83d4b87103b761bd6527b5e1eae3bc2c
font_02_sfnt_off00011008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11008 10596 bytes
SHA-256: 40beecf37dad41cc642d3aac1448e7ca54b31d11481a5d468910d8a49481de18

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