Malicious PDF — malware analysis report

Static analysis result for SHA-256 d284824e21395276…

MALICIOUS

PDF

71.2 KB Created: 2021-03-19 03:10:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: c767a45049ff294a1614df563a5848fe SHA-1: c91ca8732cda3ed740e622e91fc9ed0dbf56e38d SHA-256: d284824e21395276dd09078eb3450c333e0bc4ee9f4a3d55548966e193b89008
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of a large number of external links, including one to 'ponafet.ru', strongly suggests a phishing or SEO spam campaign. While no scripts were extracted, the PDF structure itself is designed to host and present these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://ponafet.ru/award?keyword=bacteriology+carter+center+pdf PDF link annotation
    • https://vanewuzopawibo.weebly.com/uploads/1/3/0/8/130814706/nesalesap_wapuzewinuso_bagigit_nukajukadadijiz.pdfIn PDF document text
    • https://fodubimofo.weebly.com/uploads/1/3/4/8/134884763/09004b39a30e5f.pdfIn PDF document text
    • http://sunakijabe.sportsontheweb.net/texogakisininum.pdfIn PDF document text
    • https://bimuwosexiwo.weebly.com/uploads/1/3/1/1/131164043/vijigisepazidakakare.pdfIn PDF document text
    • https://kezivujiwot.weebly.com/uploads/1/3/4/3/134329954/96a7795a72da.pdfIn PDF document text
    • http://casserlabs.xyz/71143860957oeo7a.pdfIn PDF document text
    • http://xutexukoxobofi.mywebcommunity.org/detenubiviveso.pdfIn PDF document text
    • http://lnstagram-office.com/zomirelixiluzumdkxsa.pdfIn PDF document text
    • http://dewisazovuvoxi.mywebcommunity.org/43221197137.pdfIn PDF document text
    • https://wenabavur.weebly.com/uploads/1/3/1/3/131379405/jukenorabo.pdfIn PDF document text
    • http://netewe9.xyz/81681575296v4gbo.pdfIn PDF document text
    • http://shoes-storie.club/utorrent_pro_apk_apkmirror5wwtz.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/jevedijadiki/flipkart_bedsheet_cotton_cartoon.pdfIn PDF document text
    • https://d78d2789-9aef-4bfd-88be-9093bec910ef.filesusr.com/ugd/87a178_f4961d493f404119a37738fa637190dc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/bronchiolite_obliterante.pdfIn PDF document text
    • https://a1d1c4ac-cf1d-4c58-861c-45d1188f4b60.filesusr.com/ugd/052f3a_60536178c22d407c820ace26101296b7.pdf?index=trueIn PDF document text
    • https://34184745-b1ec-4725-b105-60c94cc90871.filesusr.com/ugd/63369f_68e29e5fe4d4445e96577adf64a6188d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/31645323798.pdfIn PDF document text
    • http://xakagigoneliv.myartsonline.com/79288932028.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/pinogaforidoripexagileta.pdfIn PDF document text
    • https://3d7304b5-8527-495f-b913-615d6f357a43.filesusr.com/ugd/ef7486_4611fe03a5294bd89eb4591c27f480df.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/20154672199.pdfIn PDF document text
    • https://9c789f27-b70c-4c9d-9e83-211ee8f99b38.filesusr.com/ugd/bdeb4c_61df482350004c249682d43ef3a2538b.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_off0000cb09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB09 5084 bytes
SHA-256: 4c78f39cbc7bfc1493e2388e76d58b0db416f3f8cd217d1fd324db8235908460
font_01_sfnt_off0000dc62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC62 10820 bytes
SHA-256: 8e538871c088396e8544f6082729de04dcd9c7b222eef1091d638196ffd640c6
font_02_sfnt_off00010138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10138 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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