Malicious PDF — malware analysis report

Static analysis result for SHA-256 beac48fffc7dca5b…

MALICIOUS

PDF

69.6 KB Created: 2021-09-27 19:50:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1e0c2fe76aea31456d4451034616c15e SHA-1: a1f47947ba792c41ec14b1c8783c8dcdfe8c1585 SHA-256: beac48fffc7dca5b24c5087cdd74115ce207cd82eaf2a05c4f0c0a496c88e505
156 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a phishing or malicious content delivery mechanism. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, forming a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to external sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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 http://bayanairag.com/uploads/userfiles/files/kuxizirozuwizonuroramo.pdf In PDF document text
    • http://tokyo-sanritsu.com/userfiles/file/tujojetatag.pdfIn PDF document text
    • http://www.sudaff.com/pics/file/loxopuruzuxeparavesab.pdfIn PDF document text
    • https://libyamonitor.com/sites/all/libraries/ckfinder/userfiles/files/21640918276.pdfIn PDF document text
    • http://npcbalkan.net/ckeditor/ckfinder/userfiles/files/58725768343.pdfIn PDF document text
    • http://iviltra.lt/images/files/61088958303.pdfIn PDF document text
    • https://suadienlanhhanoi.net/upload/files/73164744181.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/20219394964321.pdfIn PDF document text
    • http://bsl-trans.ru/admin/ckfinder/userfiles/files/41422060234.pdfIn PDF document text
    • http://yuanjen.com/ckfinder/userfiles/files/67364142476.pdfIn PDF document text
    • https://rmp-traueranzeigen.de/cms/files/jagawegarobobafi.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/6641132182.pdfIn PDF document text
    • https://gestionarival.com/userfiles/file/rijunetorivavuw.pdfIn PDF document text
    • http://maximaviajes.com/FCKfiles/file/junukafazuregazasazumu.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/15966573796.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16140b9a5c3015---15819399111.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/522a25f872cdcc10191c972e9cb90fb4/90300616333.pdfIn PDF document text
    • http://vanprodukt.cz/UserFiles/File/dawetu.pdfIn PDF document text
    • http://archive-2013.humandoc.pl/attachments/file/febiziripa.pdfIn PDF document text
    • http://taiwan-tsai.com/upload/files/34795668973.pdfIn PDF document text
    • https://myparrotfood.com/user_files/files/giwefasobegusabalofawelib.pdfIn PDF document text
    • http://bosch-elektronarzedzia.pl/catalog/file/96872130877.pdfIn PDF document text
    • http://usarsenal.it/userfiles/files/gozonegekilezi.pdfIn PDF document text
    • http://hidrometa.com/images_upload/files/42357561203.pdfIn PDF document text
    • http://foto-recepty.sk/images/fotky/sobinipezonuxidetevofasa.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613d785635c14---zoloro.pdfIn PDF document text
    • http://fotografieindex.nl/images/uploads/64654076801.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=free+diamond+ml+injector+apkPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b1bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c9d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D3 10704 bytes
SHA-256: e67f11e39fdf7411065b001103a178cd10c87f0039a56514719966e4d2927417
font_02_sfnt_off0000e244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE244 14596 bytes
SHA-256: b6253a44fbf0e28746c8cdd41c0d97dfcec8636cdb875cb3195303f72c11bd3d

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