Malicious PDF — malware analysis report

Static analysis result for SHA-256 994a2e32418ed791…

MALICIOUS

PDF

81.3 KB Created: 2021-09-09 07:52:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d3f46f551187ffbf329f6a92b60e741c SHA-1: da8047e6b36ff4d00775f8462d4968805db360fd SHA-256: 994a2e32418ed791fb983d143c91645567501c571c5de01b97796f7defff172d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous links, many pointing to compromised CMS upload storage or disposable hosting, suggesting it functions as a link farm. The embedded URLs and the overall structure indicate an attempt to direct users to malicious websites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://idealist.ro/userfiles/file/48593344782.pdf In PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/53367083816.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/598c68c26b075c7293aa62432f6460e8/giwopadikugawuponakotogox.pdfIn PDF document text
    • http://torremaggiore.sitmap.it/files/files/94365468600.pdfIn PDF document text
    • http://www.dilipprabhavalkar.com/images/file/jubejofedizutude.pdfIn PDF document text
    • https://cevhertemizlik.com/userfiles/files/duwevironuriso.pdfIn PDF document text
    • http://coomargroup.com/ckfinder/userfiles/files/tidipuva.pdfIn PDF document text
    • http://dvif.fr/userfiles/file/89937896970.pdfIn PDF document text
    • https://www.habitat-morvan.fr/ckfinder/userfiles/files/diwikenejunifulifugu.pdfIn PDF document text
    • http://yomamasushitogo.com/uploads/files/46961373584.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/161346150bea65---suvotuzedovatavona.pdfIn PDF document text
    • https://adikkeempat.com/contents/files/34668449455.pdfIn PDF document text
    • http://yey.uw52.com/upload/files/99816208616.pdfIn PDF document text
    • http://anticacarsulaeborzoi.eu/userfiles/files/85225780466.pdfIn PDF document text
    • http://cnwt.mgo.cool/upfile/files/2021/09/07/finisuwazaxaxez.pdfIn PDF document text
    • https://zippy-inc.com/app/webroot/userfiles/files/75206991771.pdfIn PDF document text
    • https://nevjegyzek.eu/uploads/file/wukitaresobivixuzofux.pdfIn PDF document text
    • http://jiehuist.com/userfiles/files/pifike.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131669293acb---xoxaguluzukivinoxu.pdfIn PDF document text
    • http://apvn.info/userfiles/file/zulusakenusivajosulenawoz.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/b7ff243ae6e24db2819d94abd60da3b7/lagewutirobifevulexuw.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/rphdsebp745s83nq2achir920e/xulidinulixenixumepudur.pdfIn PDF document text
    • http://musicincw.com/fckeditor/userfiles/image/vulujaruzalavowedero.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=how+to+change+wallpaper+on+your+phonePDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA84 10684 bytes
SHA-256: c922510d84039f163a37b66c6d407b3aba7dc85e3eabb0e6a2907425836a7611
font_01_sfnt_off0000f307.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF307 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010b19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B19 17252 bytes
SHA-256: 41923329149fa55d31d08c712c007df66f848a2c204536a1465c98a3dbe386a2

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