Malicious PDF — malware analysis report

Static analysis result for SHA-256 e06b59d1e15c32fe…

MALICIOUS

PDF

77.9 KB Created: 2021-09-23 10:25:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 621e7661b079dcd505538068d1e44c28 SHA-1: bf5e1561aed2b090a5a4521e0fd4bea428199a71 SHA-256: e06b59d1e15c32fe4569aaa25facc400d74efc14bd6732aa933ec93cb006ddee
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting a phishing or credential harvesting attempt. The presence of a 'download button' heuristic further supports a lure-based attack pattern designed to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://smidgel.ru/uplcv?utm_term=path+of+sukhmani+sahib+in+reading
    • https://pensiuneaselina.ro/userfiles/file/30498338040.pdf
    • http://ricettebiagi.it/uploads/assets/file/rexuzujafuvisima.pdf
    • https://educationindiajournal.org/ckfinder/userfiles/files/vavupiwolenuzegibep.pdf
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/2uhlmbsl35ektcsj41lbgmfs43/49496240543.pdf
    • https://skywaynepal.com/userfiles/file/mojupegarosobuxipagopowa.pdf
    • https://noddy.nu/images/file/wimewolinura.pdf
    • https://aparcaderoshaddaichile.cl/uploads/images/files/57698397643.pdf
    • http://avandcie-automation.com/ckfinder/userfiles/files/duvexinoz.pdf
    • http://etyekilovarda.hu/userfiles/file/befuxu.pdf
    • http://exima.kr/userData/board/file/sagajagufoxadalivekere.pdf
    • https://coebmsf.com/userfiles/file/vodugofake.pdf
    • https://postelezmasivu-praha.cz/ckfinder/userfiles/files/xirijagoja.pdf
    • https://ww150003.linebot.net/upfile/files/20210922010846.pdf
    • http://beiks.info/public/file/70611855723.pdf
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/f13290a4bbda84e67d38cb53444e312d/rejatibofonarez.pdf
    • http://mishor-uvk.com/uploads/files/rinivotajuluroluxixumulek.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1613ff8b98846b---94564616395.pdf
    • http://www.dawnrotaryclub.tw/UserFiles/files/kaxorirekerabale.pdf
    • https://nileagriculturalindustries.com/file/dumutononipizavujixe.pdf
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/av8n8089c3pecsn08qgaa9p7bj/bokuje.pdf
    • http://baliretreatcenter.com/olabali_ci/media/images/newsfiles/danume.pdf
    • https://sabunwangi.com/contents/files/6011058166.pdf
    • http://ort168.com/upload/ckeditor/files/vobudubomirawuduvupetanol.pdf
    • http://leskovec.eu/files/file/binugesuvelodifapuzif.pdf
    • http://midel.me/userfiles/file/1352390107.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c302.bin
64f0e763c50f57f1a387bfd23f48deb5a749f8cea1fb3533d86591ac5fcd861c
pdf-font-stream PDF embedded font (sfnt) at offset 0xC302 20260 bytes
font_01_sfnt_off0000f7b0.bin
60bb633c274c3803e25e3134cb47d7e5e5135d0690a90911bad79169bce3efb5
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B0 11088 bytes
font_02_sfnt_off0001112e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1112E 16792 bytes