Malicious PDF — malware analysis report

Static analysis result for SHA-256 fce54bc3cc336edc…

MALICIOUS

PDF

76.0 KB Created: 2021-09-07 12:53:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 8844352f47f7cdad59700346b2cd3b38 SHA-1: 3bdd330756e04ac56f33e6886bfd381341cbd460 SHA-256: fce54bc3cc336edce777bbbd29c457809ce14376e39ee960262c234f7b1488d6
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious. It functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised CMS platforms. The presence of external URIs and link farm heuristics suggests an intent to redirect users to potentially malicious sites for phishing or malware delivery. No scripts were extracted, but the PDF structure itself is indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cructi.ru/uplcv?utm_term=panasonic+microwave+nn-sa651s+manual PDF link annotation
    • http://srtprogetti.eu/userfiles/files/depusosaruf.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/91647822794.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c7aa28cae2b---bujilikunikuzegi.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/tidajezobusiwi.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/juarrt6c6eivsgdnatete55h4k/96257524542.pdfIn PDF document text
    • http://superplasticizer.cn/d/files/79701515015.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/sufgu6o6m5m40s5o9k9s11ihp4/69160515068.pdfIn PDF document text
    • https://lose-weight.tw/upload/files/5334482501.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f598efc83---goduxajewezana.pdfIn PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/wewatininizogebaxuzok.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/a591e41e3dffeef690206a6ed0dd2957/jirudogugomubunageg.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/sk0tuo2csubglrecaq2morntk7/27755598173.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/bomijabapagalobawosegufu.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/0d4e6098e3bfdb6bc4bde8ddd16eb228/36638799821.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/16072ecedcccfe---85137222184.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/21257603830.pdfIn PDF document text
    • https://flyags.com/editorResources/file///kuliroxuvigejadibe.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/dozeriza.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/pidejitopalirasugefis.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/kuvozeto.pdfIn PDF document text
    • https://sinarwaja.com/account/files/46323291616.pdfIn PDF document text
    • http://yuqiaohome.com/uploads//files/202108051824217231.pdfIn PDF document text
    • http://togetherwewalkny.org/clients/2/24/2411cc079aa0f0d7fd57f81c6163ecfd/File/zabiwuxejidagabakoxopo.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c1a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1A8 18196 bytes
SHA-256: 1f81c5f731823708f35a9d0edc6564cf4e849d3237ee26f108acc579d31d6867
font_01_sfnt_off0000f10b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10B 10936 bytes
SHA-256: de5ec2b52483fa893780aa3c24c83644faa84eb26226bc4631cfa123aae79c12
font_02_sfnt_off00010a8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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