Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbb1e7de5eead57a…

MALICIOUS

PDF

76.6 KB Created: 2021-09-06 22:56:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7f725957703d4e6524acc088bd1d3727 SHA-1: f9b65890e1a2bb4fb731aabad55611f7bcf5cf2b SHA-256: fbb1e7de5eead57a48e92e7fa5b5071bc889a6ac3ad7ac87f570ddf8360088e9
204 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised or disposable hosting, indicative of a link farm used for phishing or malware distribution. The 'SE_ADVANCE_FEE_SCAM_LURE' heuristic strongly suggests the document's content is designed to trick users into paying fees for a non-existent prize or parcel. The embedded JavaScript likely serves to further exploit the user or redirect them to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://wangyiphk.com/userfiles/69373705234.pdf
    • http://innotack.com/userfiles/files/65847609209.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/1915272df84b24e1b853062202ce12d4/bitukilapafa.pdf
    • https://gs-hemeringen.de/ablage/userfiles/files/kanizavobiwigeriwew.pdf
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/81636802949.pdf
    • https://onlinendttraining.com/files/tolevowomugitiru.pdf
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/2d9i64p8pi3ec569telrfqaqe4/20299588764.pdf
    • https://travelworld.ro/userfiles/file/mofuwizogemogut.pdf
    • http://splhardware.com/UploadFile/file/2021082610005673499.pdf
    • http://golden-candies.ru/webroot/files/files/47685000763.pdf
    • https://sce.tw/uploads/files/60faeb7cc0643.pdf
    • https://sasalidayanisma.org/uploads/file/refuvafizeleniz.pdf
    • https://vydavatelstvoklett.sk/userfiles/file/1015688208.pdf
    • https://contactfm.be/userfiles/files/71744197982.pdf
    • https://tndvn.com/js/ckfinder/userfiles/files/27551863332.pdf
    • http://phukhoabacninh.com/images/files/dutepotal.pdf
    • http://tydafa.com/dafa/uploadfiles/20210811165118.pdf
    • http://asea-admin.com/_userfiles/file/20210503145016.pdf
    • http://dkyangmei.com/uploadfile/file/2021062214580673499.pdf
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/02fk60gqc6evck53v307evdc3k/71192003633.pdf
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/70c02d22875da17489e531a35dee0687/36800018147.pdf
    • http://skybuildinfraprojects.com/uploads/24842218667.pdf
    • https://myclubowners.com/userfiles/files/50962455524.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/f66c2b3bde6614c709ae29c40b7f63c0/jufak.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=vagabonding+libro+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_off0000c68a.bin
b5ee94fa772793f32e7fa6d40a0245c19979784d1e3270f5376e5d0d3d87f28a
pdf-font-stream PDF embedded font (sfnt) at offset 0xC68A 10384 bytes
font_01_sfnt_off0000dd9f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9F 16792 bytes
font_02_sfnt_off0000f5b1.bin
b76e87a2b6c87a6bd8c2dd2ac62ddc0a70c3a83ea4cda8e94ceafac92152766f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B1 17924 bytes