Malicious PDF — malware analysis report

Static analysis result for SHA-256 442613bfa5756da9…

MALICIOUS

PDF

84.9 KB Created: 2021-09-06 16:34:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: a82ec5e353a6449a965d8231a4a4e25a SHA-1: a0811c022be7b548e2f0b7c5f5973de8ac8f9975 SHA-256: 442613bfa5756da98ed7f79901e54a3ccd34a96241d2bb8c64d0ef71fb2ad787
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is classified as malicious by ML models and ClamAV, indicating a phishing or trojan threat. The 'SE_CALLBACK_LURE' heuristic suggests the document is designed to trick the user into calling a phone number, likely for a scam. The numerous embedded URLs point to various compromised websites and disposable hosting, used to host further malicious content or redirect users, consistent with a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://allytemp.ru/uplcv?utm_term=bash+sed+command+manual PDF link annotation
    • http://barudan.hk/UploadFile/file/20210713133726680.pdfIn PDF document text
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/af548db6c6a77096d569ea77df7e766f/kogevibileju.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5e8557bfd---87405116813.pdfIn PDF document text
    • https://cubic.is/userfiles/file/gotomijosowolasazix.pdfIn PDF document text
    • http://halaljones.com/uploads/files/febep.pdfIn PDF document text
    • https://ijmscr.com/ckfinder/userfiles/files/20520323858.pdfIn PDF document text
    • http://smart.sut.ac.th/tsme/src/lib/ckfinder/userfiles/files/56786961357.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fc7ff58723a955db39e59d236d2a9540/56308267944.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160f8359b723be---rawasoranagoduxi.pdfIn PDF document text
    • https://www.elshandmadedesign.nl/ckfinder/userfiles/files/67022942257.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/2f0ae2d2f6246a9de84009c97a58b3cb/gezerunanojepe.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16106612139847---73299695200.pdfIn PDF document text
    • http://refinerlink.com/userfiles/file/67398580658.pdfIn PDF document text
    • http://www.medicellbank.com/userfiles/files/51541515876.pdfIn PDF document text
    • https://biocoils.com/img/file/61481283770.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b47a00a3987---36023080479.pdfIn PDF document text
    • http://xiaohecollege.com/d/files/9534743123.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/e16ee746fe6a0dc220b6defffdba4d6e/wavafibasapakofowo.pdfIn PDF document text
    • https://quaint-house.com/images/blog//file/90760947928.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b43183e2d95---sekefokulog.pdfIn PDF document text
    • https://avgdesign.com/userfiles/file/70516302612.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610b7ed573fd1---39329017557.pdfIn PDF document text
    • https://betenagro.com/sites/default/files/file/30743432197.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/sipikuvizoduniresifo.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_off0000e46a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE46A 19196 bytes
SHA-256: ae3e620a83eca5396f83f5aa26e3c007ccf3d12136206e00f8672122920f7879
font_01_sfnt_off000116ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116AD 10500 bytes
SHA-256: bbbec01d636999c4d0d84e5b85681d2c6a9a8ca540a90de0f8216a8376ff6602
font_02_sfnt_off00012e59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E59 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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