Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ce0b95ebd8ade35…

MALICIOUS

PDF

100.2 KB Created: 2021-03-12 18:53:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3e0cc06bcaf375848238a98211102fbc SHA-1: beda1262837f7e5c540d55a75bdb0e80cc9fb377 SHA-256: 1ce0b95ebd8ade35afc7b4ab392eebc9240c0f245c85c35772bd0e51b3217a4c
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of numerous embedded URLs suggest the document is designed to redirect users to potentially harmful websites, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the embedded links and the overall detection points towards a malicious document, possibly leveraging PDF vulnerabilities or social engineering.

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://dugedepap.ru/123?utm_term=moviesda+2009+movie PDF link annotation
    • http://balegetiwep.mywebcommunity.org/gomuserarakoguguwobax.pdfIn PDF document text
    • https://rebopugosoge.weebly.com/uploads/1/3/5/3/135346619/d44e28.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxigu/hdghhjD/30827753784.pdfIn PDF document text
    • http://mirror-x.org/sefovuweximeweruvubapapegrfgod.pdfIn PDF document text
    • https://cdn.sqhk.co/rufadexu/ePiiWUu/buttons_a_musical_film.pdfIn PDF document text
    • https://vakugisup.weebly.com/uploads/1/3/0/7/130739558/f388ed3ea583.pdfIn PDF document text
    • https://pazarufawituxib.weebly.com/uploads/1/3/4/0/134000032/bosibewari.pdfIn PDF document text
    • https://cdn.sqhk.co/valujoper/wgeieW2/2210340547.pdfIn PDF document text
    • https://vowodilob.weebly.com/uploads/1/3/4/6/134697463/6729948.pdfIn PDF document text
    • https://norusukesalija.weebly.com/uploads/1/3/4/3/134356509/8095956.pdfIn PDF document text
    • http://supsun-aero.com/parallel_circuit_worksheet_1_answer_keyu40fn.pdfIn PDF document text
    • http://rupazaduxil.mywebcommunity.org/fidulatot.pdfIn PDF document text
    • http://leon-stavki.info/icewind_dale_2_dragons_eye_walkthroughlqrkp.pdfIn PDF document text
    • http://stroymarketmetal.ru/civilization_6_russia_guidezfjhj.pdfIn PDF document text
    • https://cdn.sqhk.co/kugorazig/ibjbwhe/31508211307.pdfIn PDF document text
    • http://melidagerukebel.sportsontheweb.net/83842687387.pdfIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn 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/2252b0f2-1b59-4023-a19c-82db42b4d891/sunibudinopad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95b92ab6-cae2-4501-85d1-53a88e6b779a/siwefogofutimujatenevu.pdfIn PDF document text
    • http://wodowepakimeko.onlinewebshop.net/judith_l.gersting_mathematical_structures_for_computer_science.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ced1110b-afb8-4e05-9981-1f61a52db4f2/53678968939.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99df26f9-571f-40b1-8d0f-342ad924aab2/noxerexosojidepif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d055161c-278b-46fe-a07c-c5aeb3bcd732/allen_carr_easy_way_to_lose_weight_free_download.pdfIn PDF document text
    • http://pajupevezujugut.atwebpages.com/nawerokizedojemoza.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
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000115a0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x115A0 24124 bytes
SHA-256: 825a8be80777deff916c5f94883e7bfba97c55ed15c1e96db2fbcfc1f3786c7a
font_00_sfnt_off00010386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10386 5340 bytes
SHA-256: 848a440760d998d76b2b098e8e542b62703f5c5fdbce9d125c8e93e96d826fdd
font_02_sfnt_off00015c7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C7E 12268 bytes
SHA-256: 3fed2a08f1828aae75a75a2577c43e6f40b27785788adddb12306e8b90fca744