Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fc852a29e0cbfc5…

MALICIOUS

PDF

86.5 KB Created: 2021-03-10 20:58:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: fcdf858acdec45348df52ed14a6b3122 SHA-1: 714429e7f5afac107b1521e69d1eb31f05ccf385 SHA-256: 5fc852a29e0cbfc52459b1bced6483ae534794df7709ce1c8382e7302c45f381
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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.
  • 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=reaction+turbine+velocity+diagram+pdf PDF link annotation
    • http://sosyaltakipcipanelin.com/tefizosusavetibiluzixodqm29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458625/normal_6033804265961.pdfIn PDF document text
    • http://tumbaa.space/debizesiwof0x6s.pdfIn PDF document text
    • https://zipemulobob.weebly.com/uploads/1/3/4/5/134528333/jafixifip-xixafole-zadivo-nigevakirezivo.pdfIn PDF document text
    • http://spencermcman.us/zazogojeqzxec.pdfIn PDF document text
    • https://punobedu.weebly.com/uploads/1/3/2/6/132683181/fab4c01cb0a9df.pdfIn PDF document text
    • https://kuwobudub.weebly.com/uploads/1/3/4/5/134587752/0e3a86131e.pdfIn PDF document text
    • https://luvodufugatese.weebly.com/uploads/1/3/4/8/134893210/95be6453.pdfIn PDF document text
    • https://litukepulaj.weebly.com/uploads/1/3/4/8/134863372/kuwunizogetafed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383460/normal_603b7be92b8f9.pdfIn PDF document text
    • http://cardioactiveuficiale.site/libro_juego_de_tronos_venta_chilezkyqx.pdfIn PDF document text
    • https://kolivobaka.weebly.com/uploads/1/3/4/5/134500933/fobamexejesutas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459777/normal_602b41f287158.pdfIn PDF document text
    • https://damafurota.weebly.com/uploads/1/3/5/3/135337485/gizizo-fuvoma-jelozilabuxazu-lixitiwegetade.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476765/normal_5ffaa8e3737e2.pdfIn PDF document text
    • https://datugabow.weebly.com/uploads/1/3/4/7/134745554/7884844.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://s3.amazonaws.com/baxegezivumi/report_folders_icon.pdfIn PDF document text
    • https://s3.amazonaws.com/fonibinaraj/52741241157.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/muveb.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/recurrent_herpes_labialis_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/why_my_adobe_premiere_not_responding.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/jukezalur.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/a_aa_telugu_movie_free_hd.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_off00010504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10504 5488 bytes
SHA-256: d4b80ae8bfbd18601b6dd6826f1f5231fe42505f6e248ee1a941fdadcfce0992
font_01_sfnt_off0001179e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1179E 11756 bytes
SHA-256: cb02ee3a542b245459e149dd7395ea0e7da09411ef6d84f149823d588c49b0da
font_02_sfnt_off00013e6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E6D 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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