Malicious PDF — malware analysis report

Static analysis result for SHA-256 7abeaf1eb668d05e…

MALICIOUS

PDF

176.2 KB Created: 2021-07-21 07:00:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6d55d12df4678cfb770c4beb8b884258 SHA-1: 0c62e4a9f0ef47a4240fce98fe681dbd22baedf0 SHA-256: 7abeaf1eb668d05ec7a34ff6de55331c5d5ecf20fd914cfa625f862b5dca7523
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS uploads and disposable hosting, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body is heavily obfuscated and unreadable, providing no direct content clues, but the overall structure and URL analysis point to a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9049

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 http://calebdobe.com/clients/875189/File/51657464773.pdf
    • http://evopizza.lt/ckfinder/userfiles/files/86373400406.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/16084c44b35129---67039100808.pdf
    • http://bonapartefamilynetwork.com/clients/7/7d/7d081654635712149502d88e72c54c2d/File/kuwopurajosegufobi.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/7gd90a5031oro7fftjsgrunvp1/28674872143.pdf
    • http://massintech.ru/img/outer/files/51148008319.pdf
    • https://stallion-international.com/userfiles/file/laligutufikirokokedixezuk.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160854d0346504---motufeleposamazumijifama.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160773843935b9---mizakinimobedigofesubolix.pdf
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/dmi1r7q9larrf1vof8m9eaitvs/lusuretifinegowere.pdf
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa7c8db1b5d---15558140832.pdf
    • http://mwflower.com/upimagesfile///28461157421.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd57f9170a---kozijuwore.pdf
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/14a3bc643eeca5fbb116fc16ab19b725/lakowebebonugukaboxi.pdf
    • http://urparitet.ru/admin/ckfinder/userfiles/files/muvajarir.pdf
    • http://bezagsecurity.cz/userfiles/lugatix.pdf
    • http://bigcool.net/webroot/img/files/48671442076.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/a8278cbe4fcc8fccc8df5128c3d12d68/71655966872.pdf
    • http://hillsdale66ersreunion.com/clients/c/c6/c679c52642bc64dd8629b98fb95ccc77/File/53026320040.pdf
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/b45482babf2070e89148da80998adf6e/66484706657.pdf
    • http://hookmyweddingup.net/clients/73542/File/xemepugiwojugodakofa.pdf
    • https://hocaukhudothithanhphogiaoluu.com/asset/site/files/vovovo.pdf
    • http://hungthanhauto.com/luutru/files/jekowekozipumejejufopoxi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=types+of+business+entities+and+their+characteristics
    • 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_off000204e8.bin
2cafc7998d236cf59f6581745f195aa7be33596d8a3b1b5d540172545d59d431
pdf-font-stream PDF embedded font (sfnt) at offset 0x204E8 10988 bytes
font_01_sfnt_off00021e2f.bin
798864e9bbb7ee88bba104a94095d0dead804bf6095ed7d92d8146b6a92cbc17
pdf-font-stream PDF embedded font (sfnt) at offset 0x21E2F 34584 bytes
font_02_sfnt_off00026b95.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x26B95 16792 bytes
font_03_sfnt_off000283a6.bin
33eaafea771fd863b281b20f7719b2a4a91e4e43a5f1a2f5fe47cd13c4389e2e
pdf-font-stream PDF embedded font (sfnt) at offset 0x283A6 20396 bytes
font_04_sfnt_off0002a773.bin
f990f3fd7ac84ec614dcdda90ad1a846561e5e88e809982e39dbf482e93141c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x2A773 2692 bytes