Malicious PDF — malware analysis report

Static analysis result for SHA-256 b34e2a03f70e9117…

MALICIOUS

PDF

100.1 KB Created: 2021-07-06 06:51:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 383797ca4a85147b9ed7aca5a3ee6d78 SHA-1: b64934e79a01635b363f9585b8e55bfa84a278f0 SHA-256: b34e2a03f70e91178f5f42472c3f69b7adf4c7ae2519cac62693d0576f50f2aa
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised CMS platforms. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/bsm98j4lms5c7ljkkcgqfdn3eb/wotimavifetudogefiruf.pdf
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/rc0jf12n5vndbu9ntcpc1sndas/fijetakiwurokapupirebera.pdf
    • http://evergladesharvesting.com/ckfinder/userfiles/files/6678583775.pdf
    • http://lg-palette.com/upload/files/90611233145.pdf
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160819b4b9a638---56465805758.pdf
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/410c3f07aa8ac04d9c1901acd4298e39/ginalavebipire.pdf
    • http://abwcrainhwy.com/uploads/files/47101732879.pdf
    • http://carrozzeriabosini.net/userfiles/files/kitusubibewenaja.pdf
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3b54683fa---puwaluvamedu.pdf
    • http://highendschmiede.de/highendfiles/file/34427760856.pdf
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16091be9762897---golorosad.pdf
    • https://zionapostolicministries.org/uploads/files/rubisadezevulifuj.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/6qkjurrr680pujj8tu11tnbhpe/sitomafaposibosenikipuje.pdf
    • http://summithigh75.com/clients/867147/File/52196934669.pdf
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f33eface4227783ed1b4c88f89682c22/pajoverasiwumulubodukibe.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/4da519bd3d030981b3c81118f4747547/95587987979.pdf
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/f1ad8ffdf77a49bb845b63235664815c/wojuku.pdf
    • https://lapalettedesarts.fr/gestion/file/32855693825.pdf
    • http://pizzeriadevita.it/userfiles/files/97510774667.pdf
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160adc7cd8941c---44856294200.pdf
    • http://abovomedia.hu/_user/file/vorutanirurewosuromar.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=colleen+covey+brown
    • 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_off0001224f.bin
cd8e00c9b3862948307bc1b9f16932e432999a160cfc2ed29b08e37029af9d2a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1224F 19844 bytes
font_01_sfnt_off0001536d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1536D 16792 bytes
font_02_sfnt_off00016b84.bin
c2668c8c8f08117a0f98ccce5fa57134da916b4f0641919c3ec7e915fc9265c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x16B84 10140 bytes