Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3086483b369eaf1…

MALICIOUS

PDF

109.4 KB Created: 2021-03-26 10:43:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d35135be1f282f66ba31a2726e697ce SHA-1: 5a51953bf2712fc9186b1ff437000bb98c39dd12 SHA-256: d3086483b369eaf1e321b011234b2b7393c4acf7fe908cbbe4f27440fbe51b96
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. The presence of a large number of external links, specifically a 'link farm', suggests an attempt to manipulate search engine results or direct users to malicious sites. While no scripts were explicitly extracted, the PDF structure and URL findings point towards a phishing or SEO spam attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/award?keyword=chaupai+sahib+pdf+in+punjabi
    • https://viwizabodug.weebly.com/uploads/1/3/4/5/134509287/3740778.pdf
    • https://wagetuve.weebly.com/uploads/1/3/5/3/135323282/viwepakoten.pdf
    • http://tameenegypt.com/how_to_sync_summer_baby_monitortfwex.pdf
    • http://lagejarejitog.mypressonline.com/examen_preocupacional_afp_futuro.pdf
    • https://funotagikaxu.weebly.com/uploads/1/3/1/8/131857914/676e257fbc0d9b9.pdf
    • https://dutebosolet.weebly.com/uploads/1/3/0/9/130969562/bewobi.pdf
    • http://makebugobiwuka.mypressonline.com/73860539940.pdf
    • https://gitapizi.weebly.com/uploads/1/3/2/6/132683136/1984721.pdf
    • http://mif-smeh.space/dutebivigum6sa8c.pdf
    • http://bapitafi.22web.org/delivojodo.pdf
    • http://titoto.xyz/free_acoustic_blues_guitar_lessonsejb57.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/wibadinavosunom/acca_f9_dec_2013_answers.pdf
    • http://vejosekafabij.rf.gd/its_kind_of_a_funny_story_full_movie_download_480p.pdf
    • https://f499a9ea-5579-4d3c-a180-ba191067f9b7.filesusr.com/ugd/34ec99_809b039a227849938f070c244135378a.pdf?index=true
    • https://s3.amazonaws.com/sobaketemu/zixomofi.pdf
    • http://retetopipazaned.epizy.com/annual_report_bekasi_fajar_industrial_estate_2017.pdf
    • https://a819be37-316e-4347-83bc-b067fb6953c8.filesusr.com/ugd/d5662a_9718085bdd8c4092a4148a3f23aef400.pdf?index=true
    • http://lelixik.epizy.com/aspectj_eclipse_plugin.pdf
    • http://najaxobefirag.epizy.com/solimiguxazowikurubudeda.pdf
    • https://s3.amazonaws.com/veledabejufi/libuxaxarerazoji.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012c74.bin
7d1bf893a50c6c011ffd6838e96967b4131c2b786ad05992d73446938f8c5799		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C74 4816 bytes
font_01_sfnt_off00013cb3.bin
814992be763021c11dca23fed22b8bb7a0f9688c8b5af2f3d58b36f318d7b63c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13CB3 3740 bytes
font_02_sfnt_off0001482d.bin
cb450d8b43a0591d6cab13f225a2e422b2e99a8daed564bf1b5fe52a9df4ae56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1482D 11952 bytes
font_03_sfnt_off00016d2d.bin
f14a13751da6496dee59e0a0332c93a5bbd6d227d8c6abff366f99880cf83b53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16D2D 12824 bytes
font_04_sfnt_off000196d2.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x196D2 4324 bytes

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