Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeb1daf38bed3b66…

MALICIOUS

PDF

145.6 KB Created: 2021-03-12 00:46:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 34a477bd5cefc54924eea60f3028bc03 SHA-1: 7e65d7f2d1bb28766180c880a2ff14498dad0d65 SHA-256: aeb1daf38bed3b6682cc8fe712e5d433f57b45794f8849ec68a7663b0da98b0e
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or directing users to malicious sites. The heuristic PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM indicate a link farm designed to appear as legitimate content. ClamAV detection and ML classification strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://maypoin.ru/award?keyword=prince2+pdf+foundation+training+manual PDF link annotation
    • http://evilcheats.fun/bitdefender_android_free_license_keyabjl4.pdfIn PDF document text
    • http://bivozebavi.iblogger.org/88628308360.pdfIn PDF document text
    • http://wellwork.site/3d_printed_mazezer2r.pdfIn PDF document text
    • http://menazubuta.iblogger.org/josineregedab.pdfIn PDF document text
    • http://tiwirulesu.iblogger.org/sp_racing_f3_v1_sbus.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://a4346b84-4611-49ab-b113-80c9188ca613.filesusr.com/ugd/078c79_18a34518d9114a978d49897f64222ebf.pdf?index=trueIn PDF document text
    • http://surobufalinaxis.epizy.com/alfred_adler_biography.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e9a8d4a-897e-4ec1-ab84-72744a5d6fa3/how_to_connect_anker_bluetooth.pdfIn PDF document text
    • https://b54663a3-ff9d-4122-b75c-69b71428c9b0.filesusr.com/ugd/cfa91a_43fb174d70c740e4a3e2ced9209bfdcd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba6ba0c8-edfa-4e6b-9af5-b8751eca713b/54960150314.pdfIn PDF document text
    • http://zomimek.epizy.com/bofosudowonikokedumogopux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98b95251-41ae-4ecb-b2d2-9f7a867aa7f8/how_to_harvest_and_store_romaine_lettuce.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df371067-6fdb-44d3-aa96-7a48c8c9f4ba/29905145322.pdfIn PDF document text
    • https://13a7c488-548c-4b48-b567-d2b0b9a3e1de.filesusr.com/ugd/85d67f_3aeff1140c8342cc90e864ebd3fe2953.pdf?index=trueIn PDF document text
    • https://4bf641bf-117a-4913-931f-55e49063997f.filesusr.com/ugd/5befcb_64d6e76504944c819edc7abaed72b54d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/86ed3a9b-ffc4-4656-b90a-3c798c9a7aea/56302747180.pdfIn PDF document text
    • https://1b15a19f-c8c2-4d9d-8c2f-e97aa7ecfe2c.filesusr.com/ugd/eb6c48_d34baef5d20340cba75744ced57889b6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4ef21e2-58ea-46ba-8e40-243f5245e459/kufipunujetupiladinobedib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/105cd071-6bc5-4197-a366-2620249648b5/61530525963.pdfIn PDF document text
    • http://bojefej.epizy.com/cookie_run_ovenbreak_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a8d0e0f-cffb-473f-b919-ad946bb842aa/canoscan_lide_220_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83b4f7c4-3742-47b2-a620-3b44cbe39847/what_is_meant_by_logic_of_collective_action.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_off0001f00c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F00C 5312 bytes
SHA-256: 9b2293c308c43e26889b1dc795aba498d56373fad70569b7e17c619f415286ad
font_01_sfnt_off000201f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x201F8 11580 bytes
SHA-256: 2c95409bba9b2bc0665dc55a254368b209fdb960dc9a2935aa0b88f787ebc0a2
font_02_sfnt_off000228e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x228E1 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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