Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae0f3517cc3b27da…

MALICIOUS

PDF

127.6 KB Created: 2021-08-21 12:21:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1f3bddf6b70c5b7fedab5167c93a8545 SHA-1: 3ad32d8909cdff84803503dbe96d13d57b0f8e1f SHA-256: ae0f3517cc3b27da7f164f41ebd3b69c55df372ff3a669465ba84da1329ae8eb
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs and link farm structure suggest an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://synerhu.ru/uplcv?utm_term=soundarya+lahari+sanskrit+english+pdf PDF link annotation
    • http://come2menorca.com/images/file/vafomumorofozurigevewap.pdfIn PDF document text
    • http://konyaozgunmobilya.com/userfiles/file/13455647141.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/42847449572.pdfIn PDF document text
    • http://www.macrolepidoptera.hu/userfiles/files/kerogefazalegiragudeve.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072510219c8c---64757513557.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a6591c912f7---99042325686.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/1e2f0d8e2ae5baed32d79ee2c9eb9984/nugopimof.pdfIn PDF document text
    • http://lg-palette.com/upload/files/67534387302.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/d54e7d39767cc720c1c799bafbdb1025/78676034607.pdfIn PDF document text
    • http://mitsubishilongbien.vn/images/ckeditor/files/7897376840.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/53bttv1cqnneklmodmsfbkenn4/famimuraruvugufebe.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/9372268717.pdfIn PDF document text
    • https://wietsevoermans.nl/ckfinder/userfiles/files/gebemojudij.pdfIn PDF document text
    • https://relans-nn.ru/images/docs/file/12907029591.pdfIn PDF document text
    • https://htlexpress.com/ckfinder/userfiles/files/69165154836.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/5bfeba08ee5ef804c9157f92ad3725d6/babimezelogij.pdfIn PDF document text
    • https://taiwancy.com/app/webroot/userfiles/files/98131328907.pdfIn PDF document text
    • https://hunghiephuylog.com/upload/files/gofojar.pdfIn PDF document text
    • https://actor-conseil.com/files/file/nasanig.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/587e3c679c9198dddab7d8e714088a95/fizoxokiganuwixugodatoma.pdfIn PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/1420ab2f442eaff56ed1531959326ea5/votolojutevejupesitujapu.pdfIn PDF document text
    • http://tahyuh.com/uploads/files/202108210033598905.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5615d96af3---22264611466.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_off00018cd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18CD5 11160 bytes
SHA-256: 790f37e958c449ef6def634fcc3c8208a50123c38f1395ee15028d0e5baf8167
font_01_sfnt_off0001a6aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A6AA 20128 bytes
SHA-256: 30a377e196f15b3ff9da32499929dfde6ca010a59aba57e6c518e244ec3498bd
font_02_sfnt_off0001d883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D883 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.