Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eafb2b615b06896…

MALICIOUS

PDF

80.8 KB Created: 2021-03-13 14:20:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 33153b2c32f8b413090d43b700804e53 SHA-1: db935118d546a8b4ad19991a9fd9180278d2437d SHA-256: 1eafb2b615b068963d6dd12c3c7795382a6d2a130975e339062e365b5e361f54
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The primary external URI points to a URL that includes 'award' and a keyword search, indicating a potential lure for users. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious intent, likely to redirect users to phishing or malware-hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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://xajibur.ru/award?keyword=french+to+english+words+list+pdf PDF link annotation
    • http://vixitatevejiwo.getenjoyment.net/zuvevegad.pdfIn PDF document text
    • https://movamapipimopi.weebly.com/uploads/1/3/5/3/135303402/9718370.pdfIn PDF document text
    • https://jaluvipuruwagub.weebly.com/uploads/1/3/4/7/134734890/bunifadajanupesigo.pdfIn PDF document text
    • http://zaparipajomigi.scienceontheweb.net/luwitagirarosel.pdfIn PDF document text
    • https://raziliselew.weebly.com/uploads/1/3/2/6/132695443/cad164dc87df.pdfIn PDF document text
    • http://dafiwugoxafirop.22web.org/68199350895.pdfIn PDF document text
    • http://fexevewuli.mypressonline.com/make_it_stick_the_science_of_successful_learning_free.pdfIn PDF document text
    • http://womirewuzakuf.sportsontheweb.net/d_d_acquisitions_incorporated_book.pdfIn PDF document text
    • http://baramijotafexo.mypressonline.com/built_2_last_construction_cleveland.pdfIn PDF document text
    • http://vudomafetamadig.iblogger.org/search_engine_settings_on_android.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://lirufuti.epizy.com/libros_sobre_aprendizaje_significativo.pdfIn PDF document text
    • http://mutumujod.epizy.com/57299457595.pdfIn PDF document text
    • https://94ac7338-8c66-48ed-b7e4-01cccba3eff0.filesusr.com/ugd/9b8421_88576ff4010f4fbdb7275a02c7716fc9.pdf?index=trueIn PDF document text
    • https://7fe1f042-206b-4735-a408-f56337efeeb4.filesusr.com/ugd/d34b51_cd177e4f12b0406f8cc3dbaa01cd1b12.pdf?index=trueIn PDF document text
    • http://lojupefiduk.epizy.com/cb_background_png_full_hd.pdfIn PDF document text
    • https://19508648-7f28-415f-8121-b57715dc1465.filesusr.com/ugd/9734e7_4b7e723c281c413f83d619a5c410f3da.pdf?index=trueIn PDF document text
    • https://84bd2c60-91d0-47b6-9565-6ae8a6593e58.filesusr.com/ugd/963627_0f3281e787f9491a8b173bb87b21f5ac.pdf?index=trueIn PDF document text
    • http://fofeparulofiz.rf.gd/tolobawugikatuwolu.pdfIn PDF document text
    • https://2703069b-a6ff-4ff9-983c-db139a8d76ba.filesusr.com/ugd/8b61cf_52be2a396fc0452998fdb824e5abb2e7.pdf?index=trueIn PDF document text
    • http://radopafoxewu.rf.gd/12092586876.pdfIn PDF document text
    • http://sizatopus.rf.gd/kavogavuvunumazawupofuli.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_off0000f184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF184 5044 bytes
SHA-256: 20087ba667112c8dcf3b5efbfb4fd66ebd5912faabacdeb358567bc2806decae
font_01_sfnt_off000102b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B3 11196 bytes
SHA-256: 4f00fe8f4139841697c67ed1b4162cd193932150611df0098b3d686f88ea51f0
font_02_sfnt_off000127d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127D5 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2