Malicious PDF — malware analysis report

Static analysis result for SHA-256 af8beeec816bff69…

MALICIOUS

PDF

80.0 KB Created: 2021-07-14 03:29:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: eb82562b89c3ff536283aa77b3faeafc SHA-1: 5f8d196cdb9e982f2ef591a1fd667bc1153a9a31 SHA-256: af8beeec816bff69dc13a5c124087a669f06354fbaf08ba72a3543f66d619346
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous URLs, many of which are hosted on compromised websites or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9005

Heuristics 5

  • 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
  • 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://alexlunacoach.com/img/editor/file/wozul.pdf In PDF document text
    • https://dlt-nkp.com/fileupload//file/titazofenukilek.pdfIn PDF document text
    • http://ropesadventure.com/d/files/gekisu.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcb31e2c36---babir.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/f5b033381da1c8b8c40ec317200f858b/50801530962.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/91653013321.pdfIn PDF document text
    • https://anduong-nhatthanh.com/uploads/news_file/kazijafi.pdfIn PDF document text
    • http://industriefotografie.ch/userfiles/files/pirigimupitimi.pdfIn PDF document text
    • https://whitesal.com/data/images/file/3671_20210601094639.pdfIn PDF document text
    • https://pui-vital.ro/msg_media/file/matilupelelaruguwibuz.pdfIn PDF document text
    • https://akproauto.net/nbloom/fckuploads/file/xiwavojabejuxilipasojupor.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/959844412af753c511bf5fe27ea7449e/lazenabixeruzefusam.pdfIn PDF document text
    • http://fairtradeportal.pl/userfiles/file/79918072607.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/f1ae7cb0b1b86f5a39dbbcd2e07e8b61/98329451294.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/46f959acdedb2532924655d8b85bacf0/76943438353.pdfIn PDF document text
    • http://nfc.soo.jp/file/jujekagabulexarux.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099c68cf417e---mufikafadene.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16084d29cc8129---ziveritefafize.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/31119934999.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7ad802bdca---wuxibuminawazodibapapit.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e7481a9a36d---68182866610.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abfbb84bb95---40350652549.pdfIn PDF document text
    • http://placc.info/up_image/80701336219.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=tupac+changes+free+mp3+downloadPDF link annotation
    • 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_off0000e992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE992 18908 bytes
SHA-256: 64a7877aa91c12d6dceea92dcec3dc475038ff0fa11b41b2be29c80255ba74e2
font_01_sfnt_off000107ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12003 11200 bytes
SHA-256: eade5680a53801e7069381424746e2ee27bad5cd2643b5d19e956e9f2aa36bce