Malicious PDF — malware analysis report

Static analysis result for SHA-256 281e191fb79f428c…

MALICIOUS

PDF

81.8 KB Created: 2021-03-15 14:16:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: cac73c15aa54154181fece7e9705826f SHA-1: 21e2197325a12183be7700adb374cb1e32b2ab7b SHA-256: 281e191fb79f428c4933ed844155f996022a66f444af7f918395464cb001671c
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates this malicious intent. While no scripts were directly extracted, the structure and embedded URLs suggest the document is designed to redirect users to potentially harmful content, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://baarspo.ru/award?keyword=angular+2+download+blob+pdf PDF link annotation
    • http://my-favshopd.online/blme_ilemi_4_snf_test997mu.pdfIn PDF document text
    • http://inostrana.com/strike_fighters_2_north_atlantic_download98u4w.pdfIn PDF document text
    • http://vidclips.design/7914932895v192z.pdfIn PDF document text
    • http://alcozerox.com/501044256721ybe6.pdfIn PDF document text
    • http://wezenilokiwuv.iblogger.org/nigesata.pdfIn PDF document text
    • http://zoompol.xyz/54152517150l4skt.pdfIn PDF document text
    • http://paganel.world/sinekadamigugetfm62y.pdfIn PDF document text
    • http://nout-sale.site/304740918060dwdx.pdfIn PDF document text
    • http://wwwbcpzonasegura-viabcp.com/namawaraweb6wqm7.pdfIn PDF document text
    • http://kernig.store/46807310874nc1y1.pdfIn PDF document text
    • http://fitokaps.xyz/soul_worker_japanese_voice_packqzxn7.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/2c805d0e-c574-4408-ba8f-d634e993cfa5/2000_gmc_sierra_starter_wiring_diagram.pdfIn PDF document text
    • http://jedabotuz.epizy.com/center_parcs_elveden_activities.pdfIn PDF document text
    • https://e86c6366-0652-46cb-9e1f-5633a133dba9.filesusr.com/ugd/510a18_a7527d1f2f8f48e89f1a1eaef9cf890f.pdf?index=trueIn PDF document text
    • https://6949ea00-23ec-4f7b-922b-ae7adf19e09d.filesusr.com/ugd/76de1a_d3b0a9382a5043b392eff4e995430db8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/01204bf5-89ac-4e9b-8bc4-5084f9a940c1/tabla_de_conversion_de_pulgadas_a_milimetros_en_tuberia_pvc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50e4bfb5-3cdc-40f4-833c-3970fb5a4f65/22357659249.pdfIn PDF document text
    • https://73c25812-7308-4b32-b985-10e2a25710ca.filesusr.com/ugd/5b604d_ac60ef882f5e406f8e4339a0b6990e64.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a8c925f-70ca-4088-87d6-147d80a72416/what_do_the_wicks_on_candlestick_charts_mean.pdfIn PDF document text
    • http://nomulumipal.rf.gd/dream_from_my_father_barack_obama.pdfIn PDF document text
    • https://fec450ea-b80f-4746-b851-35139cc02de5.filesusr.com/ugd/53a83b_0d15be8ff5384b8ea3b91f28489b8cb6.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_off0000f52f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52F 5384 bytes
SHA-256: 05b9b343bc4ba8a58a5bed9e337b977261abb91380895568a4cf82a948052742
font_01_sfnt_off0001079a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079A 1800 bytes
SHA-256: 6d2a3a16cc464ce72cf05976c7f96a31c93af2202e0dc760c37a694345e222ee
font_02_sfnt_off0001102a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1102A 12144 bytes
SHA-256: 2b0571fecab475ac52812fddf5256e1e48a6de295176d922fb0749ec9fb34665

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