Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccb892ee1b096e02…

MALICIOUS

PDF

82.1 KB Created: 2021-03-17 19:05:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: a2c4485f1585b29b15ce1dec43d2274f SHA-1: ddd0f9ca272a347f045ce9982bdfdf0469036014 SHA-256: ccb892ee1b096e0228b36c64938d8aea2c68e652db1e3d96da640d63c167aec3
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a high-confidence ML classifier and ClamAV detection indicating malicious intent. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM suggests a link farm strategy, and the presence of external URIs points to redirection to potentially malicious sites. No scripts were extracted, but the overall structure and URL distribution suggest a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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 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://jottigo.ru/wix?keyword=map+with+symbols PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470961/normal_6022178a4381d.pdfIn PDF document text
    • http://hallhq.xyz/bill_of_lading_short_form43men.pdfIn PDF document text
    • http://wwnews.site/anniversary_wishes_song_for_husbandog05r.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407084/normal_5fc735bab6002.pdfIn PDF document text
    • http://miravozexafoxiw.iblogger.org/hp_officejet_4500_price_in_uae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424026/normal_604a4ce0b2adb.pdfIn PDF document text
    • http://xupenirulavep.iblogger.org/bible_verse_answered_prayer_niv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475729/normal_60053ffdad9ea.pdfIn PDF document text
    • http://return-0.com/nordictrack_commercial_1500_treadmill_reviewyufv8.pdfIn PDF document text
    • http://thesimplycompleteseries.com/64226203548heu7w.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476954/normal_5fc898766ff32.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
    • http://ragoposetetadu.epizy.com/disable_restricted_mode_on_android_phone.pdfIn PDF document text
    • https://d6b7b3c7-8429-4d82-9d75-5d5d09e763cc.filesusr.com/ugd/a8c229_9f54625008b846bb861e6c74066bf771.pdf?index=trueIn PDF document text
    • https://5bf49506-6ef1-42f8-8f90-7e3689255fd3.filesusr.com/ugd/8fe1bf_a4dc1fd9dfd84781869cfc27bf6907fd.pdf?index=trueIn PDF document text
    • https://b6c9d0de-81a1-4db9-ab7d-8a95af9e63d6.filesusr.com/ugd/b28ae2_6644508fa01649b88aecae02b5c2b41a.pdf?index=trueIn PDF document text
    • https://05282879-aed3-4f16-ac14-d534add4d4bd.filesusr.com/ugd/0f8b7c_4398707d8c834d15934065c2c594a17d.pdf?index=trueIn PDF document text
    • http://zikapoxev.epizy.com/gegofeset.pdfIn PDF document text
    • https://1416a32c-f91c-4ec3-9c10-bfdf610c7df7.filesusr.com/ugd/76de1a_b23b98f133bd40c385ab8c0b1e972e63.pdf?index=trueIn PDF document text
    • https://625f08e2-3d8e-45b5-8e8c-b95d001c5c7c.filesusr.com/ugd/d94ae5_699361694aea42eabed4f577c7182cd2.pdf?index=trueIn PDF document text
    • http://ferenekukosazu.epizy.com/82057468612.pdfIn PDF document text
    • https://6363ce23-9394-4102-a476-7be320345719.filesusr.com/ugd/7c41c1_fe9e149c247840e4be863170d81c09f9.pdf?index=trueIn PDF document text
    • http://suborox.epizy.com/jurokikemenonezinilokuf.pdfIn PDF document text
    • http://mutijisugo.epizy.com/olentangy_berlin_football_schedule_2020.pdfIn PDF document text
    • http://munoxefarofow.rf.gd/61315343048.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_off0000f8d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D5 4864 bytes
SHA-256: 894c7d9e04492d7c95f8f3a50d1d0bbd5812d2d1176823cca224e6205e6c629a
font_01_sfnt_off0001096e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1096E 10364 bytes
SHA-256: 31f26467598888d6f00d4fd0000a4df08559c317b199707d974f79c593f16261
font_02_sfnt_off00012cf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF9 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3