Malicious PDF — malware analysis report

Static analysis result for SHA-256 32502b0628b9a57e…

MALICIOUS

PDF

87.1 KB Created: 2021-07-03 08:01:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2b5acef15b1d1ffdf92266c40b3d0d9b SHA-1: 7df23cd6e305fcf8fe0013f26e2c1d59def249e2 SHA-256: 32502b0628b9a57e368182d6804da12f3faf4089382738a0d7ca608b2f0240ba
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites, designed to lure users into downloading further malicious content. The presence of external URIs and link farms strongly suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://crysiq.ru/uplcv?utm_term=the+bone+behind+your+ear
    • http://aimic.com/userfiles/file/wisorekorenibadagito.pdf
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/b35e18cd2e2e9dc4d2a1fdfce889b8c3/putuxujobixoromusedut.pdf
    • https://gamaconsultores.cl/upload/file/78166106562.pdf
    • http://tsradviseurs.nl/mailing/images/photo/file/49300375070.pdf
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/j6pbcfhsnc5gm1g9gh8be9duj3/jenetaxun.pdf
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/401e728b6e258c49bdd3afa8f6319b00/poram.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/klmcvcmmbnstk5s9h5sj6s9p95/fedal.pdf
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160bc38bac6a55---kikasesibikoparuvilo.pdf
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/9ikinvbis1dsk3k32m4bgvpesa/geluwogik.pdf
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/6790bda048e5db05a31e006cb7b7796e/kaxurefikaxor.pdf
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/3694decb6f46c19d5bb6a37a2a295693/75277763021.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160adc3f67f3d2---kifinilopunepuwapenasom.pdf
    • http://mispuntossaga.com/campannas/file/kusesejegiduwodujeja.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16096746c973ed---50974062405.pdf
    • http://carsongrad75.com/clients/3/35/35717660c32d3dd9b0ffde8f33a19d23/File/kobitukemotunorovotuzi.pdf
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/k9u8e9phks58p1utougt3jan1d/51061891397.pdf
    • https://grup-insaat.com/userfiles/file/99603309871.pdf
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/418dbdcc04b56bab2f8ba414f2187f35/wujotoros.pdf
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e6a153c2b1---jigigifawad.pdf
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/3763f3039b6436dfaf7a984060e75b60/86966952775.pdf
    • https://limmaginebistrot.com/file/75858138172.pdf
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/50ugounksrng6gbn9m90nvt531/tiguwedapopurijarodopolos.pdf
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/eddaaa7c43c1a0497a593fcee1e47406/41052691642.pdf
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/qsj3vkhrgcntskctigo977of1r/44140970100.pdf
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e61947c4ca---zerevoludolazapuxabob.pdf
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/2911957oju8nj7d8jr1sskflio/20477177078.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_off0000f530.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF530 16792 bytes
font_01_sfnt_off00010d42.bin
aa20dd3652e55f706db01a013e828569ef9a4eeffe6dbd5a1e11f355c4a25226
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D42 16396 bytes
font_02_sfnt_off000137d6.bin
a832f45d8213a23908b462fffbe16ec064ab11eb6eac67839a79c5f4620cd057
pdf-font-stream PDF embedded font (sfnt) at offset 0x137D6 10352 bytes