Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6166201a0568d4f…

MALICIOUS

PDF

127.6 KB Created: 2021-08-03 09:50:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4297742bf82cbdeeafedf6cb8f41c60f SHA-1: fa976406318d3541c332e184967215c794de6040 SHA-256: c6166201a0568d4f9430e4abe781d4d51fb7ceb3b8b1e270d6a45ae4ba03e61f
204 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a ClickFix social engineering attack. It contains a visual download button and instructs the user to execute a command, likely to download and run a secondary payload. The document body is heavily obfuscated and contains numerous links to potentially compromised or disposable hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://kaxtongroup.com/home5/maxconne/public_html/kaxtongroup/assets/images/newspostimages/files/55869702261.pdf
    • http://stananddiane.com/clients/6/67/672a2699e369d648dd23e03de9deda78/File/85973580078.pdf
    • http://rulada.by/upload/editor/files/sepedapafopo.pdf
    • http://hnspkjx.com/d/files/zizoxopizerizeradejidiwu.pdf
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/fa65b7e14fce3c5f374cea8952782bdd/dojemerumedenanodajumid.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/0215ec557132a9929be3be74ca0c8c14/26648015331.pdf
    • https://www.alapan.org/fckimages/file/kanotaduvuxaxoso.pdf
    • http://enjoy.sk/editor_uploads/system/files/jeweluv.pdf
    • https://premiersuli.hu/files/files/86816114383.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088abe8b1dbc---63057673167.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c78906147e---72238395275.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b0ad1cd4762---rekegabanulekox.pdf
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2fa6099d5a---26118939517.pdf
    • https://mobspace.xyz/web/img/podborky/files/xopedabek.pdf
    • http://iowatriallawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/beweluromuluj.pdf
    • http://ekopaczka.pl/imgbrama/files/73651377629.pdf
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb33718f26---39688065641.pdf
    • https://loyallcanada.ca/editor_files/file/tiwajo.pdf
    • http://scamps.biz/userfiles/file/11238974898.pdf
    • http://ccshecea.org/upload/files/34179426019.pdf
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/796f93435845690303b937db39be9631/74350148924.pdf
    • https://coil.hk/upload/files/10750470483.pdf
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/c2c030bda3ed55a7ac705be05a7210be/gekuwuvimuwakopujedilale.pdf
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/a25c2e3b9dc92ff5164b97aa1d7ace4d/bawusibom.pdf
    • http://allivecoat.com/userData/board/file/64575969701.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a557f8c89c3---89454411881.pdf
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/d697b11ca6c88acfa470e3ecb4b13947/38792484123.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=sat+writing+cheat+sheet+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_off00018fa5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x18FA5 16792 bytes
font_01_sfnt_off0001a7bc.bin
37588331469f576bed80020043551fe48ba8917f81246658f2a22979c368e3f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A7BC 10892 bytes
font_02_sfnt_off0001c0b2.bin
71b06dabd8f9a164af57e32d2313f6933ba634d8215bad5a5ab0a59bd1b6b00b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1C0B2 17800 bytes