Malicious PDF — malware analysis report

Static analysis result for SHA-256 8490e5cb902be8e5…

MALICIOUS

PDF

78.2 KB Created: 2021-04-04 18:15:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 1ae5cb12c0958aa593cd04199d285cb8 SHA-1: 00bf9742747ba4cbf87f098c4f7052f7bef272a8 SHA-256: 8490e5cb902be8e5c88e50a97db363bf8d371d4b88864a3df4e66a10dbee840b
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, a common tactic for phishing or distributing malware. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to redirect users to potentially harmful content, possibly exploiting PDF vulnerabilities or leading to credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://pelibifir.ru/aws?utm_term=2009+civic+maintenance+reset PDF link annotation
    • https://puwowuxavuz.weebly.com/uploads/1/3/2/6/132682233/pupetejo.pdfIn PDF document text
    • http://pupofikavize.iblogger.org/milady_chapter_15_test_answers.pdfIn PDF document text
    • https://rixolojujosu.weebly.com/uploads/1/3/4/6/134622111/wijuxefojalifor.pdfIn PDF document text
    • https://dirotigakavomak.weebly.com/uploads/1/3/4/2/134235834/2877481.pdfIn PDF document text
    • https://japugaze.weebly.com/uploads/1/3/5/2/135295186/cd8f7f.pdfIn PDF document text
    • http://vuzakovinetata.22web.org/how_to_make_a_3d_skin_model.pdfIn PDF document text
    • https://zavurebugefogoj.weebly.com/uploads/1/3/4/3/134397626/f2646772754.pdfIn PDF document text
    • https://togawikanow.weebly.com/uploads/1/3/5/3/135320583/modasejokimajidupe.pdfIn PDF document text
    • https://vosovijuz.weebly.com/uploads/1/3/0/8/130813614/ed00bfe6042.pdfIn PDF document text
    • http://dokukuke.mypressonline.com/9472421508.pdfIn PDF document text
    • https://bedujutetedaj.weebly.com/uploads/1/3/0/8/130874043/genudebakodi_ramod_xagawifinulun.pdfIn PDF document text
    • https://kokujilu.weebly.com/uploads/1/3/1/4/131453241/zabemefumokavi-dejurozemaxir-fidule-xevadevise.pdfIn PDF document text
    • https://jezaborerokifev.weebly.com/uploads/1/3/4/3/134392790/3775176.pdfIn PDF document text
    • https://donabetolemi.weebly.com/uploads/1/3/1/6/131637402/4997286.pdfIn PDF document text
    • http://xilexevu.scienceontheweb.net/xinuviwowadiwof.pdfIn PDF document text
    • https://lerasakob.weebly.com/uploads/1/3/2/6/132682990/nubanigexom_ladepurazixu.pdfIn PDF document text
    • https://jupolojujilozas.weebly.com/uploads/1/3/4/5/134598947/mafexorejonadazaxa.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
    • https://ed0f7819-48b4-4c0d-9119-93de03d81b9c.filesusr.com/ugd/e481ce_1ce157def38d438085df9ad980c1cab3.pdf?index=trueIn PDF document text
    • http://duziroro.myartsonline.com/lelopivapegurip.pdfIn PDF document text
    • http://mimiwuzoxul.epizy.com/kobalt_8_gallon_air_compressor_parts_diagram.pdfIn PDF document text
    • http://wukefomirufiza.rf.gd/pezin.pdfIn PDF document text
    • http://norenebe.rf.gd/gunimomineradowaw.pdfIn PDF document text
    • https://87b84290-c0b3-4c73-97a1-3d59c64c3f69.filesusr.com/ugd/c638b7_d92f9265c32b4dfb8d8b319195e4b3fb.pdf?index=trueIn PDF document text
    • https://47a25507-5c4f-4e73-9b7c-0c49514c8174.filesusr.com/ugd/e00bd3_81fc229095854b4ca81ae18d96bfccf1.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_off0000e5b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B8 4984 bytes
SHA-256: 739b21fd68622ff8de5d87527487a452045f536f45969d1e4b6f3877bb714fad
font_01_sfnt_off0000f67f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67F 11536 bytes
SHA-256: 1a7022ebf794d878879c9acebec51a14d7a23b389fd4ab905e6260d5f0c4be9a
font_02_sfnt_off00011d58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D58 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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