Malicious PDF — malware analysis report

Static analysis result for SHA-256 298b9ffd99cc24a3…

MALICIOUS

PDF

98.7 KB Created: 2021-03-19 10:30:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: db74fe3df37caf5e769f591b6ff578c7 SHA-1: 93498dd122873fe229b3fbb50c878c0d9a786865 SHA-256: 298b9ffd99cc24a38b8726d8c8561a4180d97835e77c79b11d97140e71c6ae9a
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm used for SEO poisoning or directing users to malicious content. The primary malicious URL identified is https://xezojetit.ru/award?keyword=amitriptilina+25mg+bula+pdf, which likely serves as a lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://xezojetit.ru/award?keyword=amitriptilina+25mg+bula+pdf PDF link annotation
    • http://help-ruleviolation.com/pusamefajurk8uxa.pdfIn PDF document text
    • http://mini-cam2.club/pikavevubanuvotoxivefenwd43y.pdfIn PDF document text
    • https://kimewazokedusa.weebly.com/uploads/1/3/1/4/131454536/xipedikat.pdfIn PDF document text
    • http://clyb-wylcan3.space/heavy_metal_hard_rock_radio_onlinergq7w.pdfIn PDF document text
    • http://jobs-ingenieur.best/margaritaville_bali_frozen_concoction_maker_recipesanfku.pdfIn PDF document text
    • https://werevofapopaja.weebly.com/uploads/1/3/4/4/134492388/1ed93068f07.pdfIn PDF document text
    • https://xegejigavo.weebly.com/uploads/1/3/4/8/134883842/aad5d9d1d2344.pdfIn PDF document text
    • http://pukoruserega.22web.org/badrinath_video_song_3gp.pdfIn PDF document text
    • http://meinekarten.best/genesis_50_1-6_meaningxa5xg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nomosirusuborif.epizy.com/complete_anatomy_app_free.pdfIn PDF document text
    • https://7fe1f042-206b-4735-a408-f56337efeeb4.filesusr.com/ugd/d34b51_c35d48936fa14cc28c946b74f70bf0f9.pdf?index=trueIn PDF document text
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_53fb470939434b80b2db16e9bcb4abf0.pdf?index=trueIn PDF document text
    • https://34570882-574e-4d25-8c0e-d8b9b6c2967f.filesusr.com/ugd/cb2bed_19890ef40c6c41afb9c29f13f7c544fa.pdf?index=trueIn PDF document text
    • http://bideliv.rf.gd/22960920583.pdfIn PDF document text
    • https://b6086c54-8ef4-40f3-ba18-bbbb993b339e.filesusr.com/ugd/36e927_2f567681134a46178a8d43485c7e2268.pdf?index=trueIn PDF document text
    • https://11484d69-1612-41b9-9199-165df1f08223.filesusr.com/ugd/e2f197_15e25b395a6c47f194bfb750f4e57608.pdf?index=trueIn PDF document text
    • https://29159626-56e2-4eb2-a8c1-eb081f451e44.filesusr.com/ugd/a58502_d08e5205577d4c72a07cff5db2adf654.pdf?index=trueIn PDF document text
    • https://6baea7ca-81e4-4a11-8410-716433a99462.filesusr.com/ugd/764aaa_630b50f74eef45e0b3f3cf9e958e729a.pdf?index=trueIn PDF document text
    • https://c33c3ce4-fa2f-4f19-9477-7a801b41b29e.filesusr.com/ugd/ebbcbd_4b8268555f1f456e9e09e58dd6f33bfb.pdf?index=trueIn PDF document text
    • https://91ca87c2-c493-4616-adaa-fbcec45394e1.filesusr.com/ugd/6116da_1faf74898c3c4f2ebaf0e3695facfe09.pdf?index=trueIn PDF document text
    • http://jabelakejirer.epizy.com/tupamuperexudikebusun.pdfIn PDF document text
    • https://ac65beef-1c88-4b01-a948-251493ed82f2.filesusr.com/ugd/09857b_c0a3e41b865c4d8f9de49eafcf17696f.pdf?index=trueIn PDF document text
    • https://7f1888b6-cdab-4603-9914-1cf81a8b29aa.filesusr.com/ugd/6846fe_64a7bfb8c427490ebf34350d12068483.pdf?index=trueIn PDF document text
    • https://38c8c62e-1823-4c1e-8220-bc61efcc8a1c.filesusr.com/ugd/c24b9b_818828e3de8e4581a7beeee2508c8921.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013f1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F1B 5568 bytes
SHA-256: 2bf91bc73b875bd92293cd2fa6c61bc1c8471577c2418bb2cc39585f53c6e58e
font_01_sfnt_off000151f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151F5 14676 bytes
SHA-256: 51cfd748ce9fd7cdba684f5aaecddf522d9bf439afc1d600310c8bfe3c9c0d1a

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