Malicious PDF — malware analysis report

Static analysis result for SHA-256 28ada97d6c7a9411…

MALICIOUS

PDF

126.0 KB Created: 2021-03-16 07:21:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: c193566854eb6f036d2f48129ee0b4fb SHA-1: 450b6011036b1cca4580648813f79b710e5f8679 SHA-256: 28ada97d6c7a941101618874b6d5f5635efb62d86de280d86cdadba6dfccb555
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary one pointing to 'lozipotod.ru', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to host many links on disposable domains, further supporting a malicious intent. Although no scripts were explicitly extracted, the presence of external URIs and the ML classifier's high confidence score strongly suggest malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://lozipotod.ru/award?keyword=abacus+how+to+use+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369909/normal_5ff53f4ccfcba.pdfIn PDF document text
    • http://xemokajoled.medianewsonline.com/buwakigolefuberiziveref.pdfIn PDF document text
    • http://desajegurake.scienceontheweb.net/beps_action_plan_8_10.pdfIn PDF document text
    • https://cdn.sqhk.co/kevamubeminu/ghwjijd/50081726310.pdfIn PDF document text
    • http://wusozupu.mypressonline.com/buoyage_system_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428331/normal_5fc89353dca48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386335/normal_5fe8bb03a1d36.pdfIn PDF document text
    • http://dizititakozazi.mywebcommunity.org/30017348498.pdfIn PDF document text
    • https://cdn.sqhk.co/potonefamuve/bjdTNx9/nopeveponupo.pdfIn PDF document text
    • https://cdn.sqhk.co/muvotugi/ejgibM3/sukisuxijijorasiriguge.pdfIn PDF document text
    • https://cdn.sqhk.co/negapevu/gijhgib/amazing_thief_synonym.pdfIn PDF document text
    • http://fiwetud.scienceontheweb.net/80630654433.pdfIn PDF document text
    • http://nawavidosuk.medianewsonline.com/23656756962.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vujijemu.atwebpages.com/38418845788.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/162d9131-60cf-4df1-bfe8-b3d44bf06291/zivudutakesupelutuma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66fe8008-a8bb-4986-a21b-74c0f0479d7f/12986013471.pdfIn PDF document text
    • http://sanojepenot.onlinewebshop.net/32126419979.pdfIn PDF document text
    • https://58f604bd-1fd8-4cfe-af9b-f15e67d030d5.filesusr.com/ugd/9a7439_ba3020b427034ae09741f842a403821d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cc10721-afee-4fc8-b303-6667968c2166/62225893668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3098236-da0c-4ac2-a4fb-38de5aab9cac/qu_es_una_ficha_bibliogrfica_de_un_libro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89866e95-fbfd-407d-8247-e66c06a855d0/simple_ukulele_chord_chart_printable.pdfIn PDF document text
    • https://14864a69-2465-45da-a912-c6f78a3f99b9.filesusr.com/ugd/409ca8_ef0e1274bbf64c369a5648551cfda358.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000177d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177D5 6004 bytes
SHA-256: 6adec6c845c6761edb3f1bb9e4357d5de32664db83d983335e2f6ea01bdb67d1
font_01_sfnt_off00018ca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18CA7 5336 bytes
SHA-256: 3e7bf25af0149db6ca152d4896f6c677dcad6b5b81eee3c8ca6bae8a01318ab8
font_02_sfnt_off00019ee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19EE2 18100 bytes
SHA-256: 865a5660b29e287b245437da0740730f096d2837d8d0e50e6d03fc776976b95c
font_03_sfnt_off0001d4ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D4CA 16060 bytes
SHA-256: 99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953