Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e0dab2867c727ac…

MALICIOUS

PDF

102.2 KB Created: 2021-07-05 07:09:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 39ae8c810bb3ebb096706e3ca6c5a099 SHA-1: 942e10654516d744eb2e4e3a4d181f63b6d6f4b6 SHA-256: 4e0dab2867c727ac58cc45b8539519de8144d17162a14d90371849944b30e071
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, directing users to multiple external websites, many of which are hosted on compromised CMS platforms. The presence of numerous links and the nature of the heuristic firings suggest an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9711

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://auf.vn/wp-content/plugins/super-forms/uploads/php/files/cb57k4afbfsvgvp498r4c45lr0/46829063344.pdf
    • http://activesolutionelectric.com/images/file/36709786754.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160782e229157a.pdf
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/1f6u2534ckvk1fbm8ev0jafc6m/kelunoxo.pdf
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0bcd5d7b1---47990713350.pdf
    • https://bangprice.combangprice.com/beta/cms_image/file/13698073681.pdf
    • http://aitrans.org/UploadFile/file/F1202106100317314775.pdf
    • http://agavietnam.com/img/files/73610851141.pdf
    • http://www.deco-interieure.com/userfiles/file/sofapuponixawodutigiro.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b03aaf0cf9---34662844596.pdf
    • http://bluecars.pl/userfiles/file/xizaruradevipito.pdf
    • http://anjilh.com/uploadfile/file///2021050223080263.pdf
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d67f5b4cf3e16c43c1343cd150dd695b/91957818803.pdf
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/afa03e1a9b935d28c828da461fab09e4/nonabarefotalorene.pdf
    • http://menloathertonhigh1980.com/clients/6/6f/6f83464fe0b13873896cace574d4baa5/File/gatobizopowi.pdf
    • http://greathorserider.com/ckfinder/userfiles/files/rukazuneziraxinolixanujaw.pdf
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/c1341b10d8c3ad662ee7ea685aad4463/43823983733.pdf
    • https://mytalk7.com/_UploadFile/Images/file/dapekunusikop.pdf
    • http://aristosaigonhotel.vn/uploads/files/dadotabenuwepesogosewoka.pdf
    • http://cpk.by/ckfinder/userfiles/files/rowefoninekufotobi.pdf
    • https://addsfly.com/userfiles/file/44297942297.pdf
    • http://anhuifan.com/upload_fck/file/2021-5-1/20210501080957651653.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/f31f57b6aaee00231fd6f1afd21ca272/pazife.pdf
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7816ba28f6---sateleboxurivenijiba.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+grill+hot+dogs+in+oven
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010730.bin
84392fae713996b4677429325009e930c3859e53b119d77b3a260b255e1fe5d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10730 16968 bytes
font_01_sfnt_off00011fd2.bin
7686a89554fbcf6b63f7d5aae3757a23d93c8657d203e0549f344873d1449ac1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FD2 19212 bytes
font_02_sfnt_off00015238.bin
065c7a4f11f9e75f6e8b37807bc82b370f7b2846456f0b3b832c619392bb01b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15238 1824 bytes
font_03_sfnt_off00015ac9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15AC9 16792 bytes
font_04_sfnt_off000172e0.bin
4e954896339e615cdaaaa058fddd72d6137a252675ab48548ffd7d95f6c5a6a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x172E0 10508 bytes

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