Malicious PDF — malware analysis report

Static analysis result for SHA-256 06d8b3082da586d8…

MALICIOUS

PDF

87.0 KB Created: 2021-06-27 23:10:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 27f85294e464c67859f3cf7e44d1002f SHA-1: 3dfc5f05a3c9aaf19bc001773416d37c061d620f SHA-256: 06d8b3082da586d845715290201917559f335a409621a8023baeb3ebae80deea
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites, likely intended to lure users into downloading further malicious content or visiting phishing pages. The presence of external URIs and the overall structure suggest an attempt to exploit user trust through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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 http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0dc3749499---supukekawodove.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160710dc576622---zisilumutew.pdf
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fac632f686---naxijifademirifewuko.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098957953ddd---bizefojexoxugabave.pdf
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b773c3c5951---lipafapuwes.pdf
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/63e90a4847ee86bb6c280949d19d7c8b/pokazabawejabodoxulebiwi.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3a0a01a535---8815457707.pdf
    • https://edmaker.site/wp-content/plugins/super-forms/uploads/php/files/a544269a130a7e3fad1f61f1afdda2c1/riduleb.pdf
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/0dcfdaa9845bfd3fe0d41206dde2e287/tivimudarolona.pdf
    • http://gtlmarinefuel.com/userfiles/file/1855540409.pdf
    • https://cambodiaangkorhomestay.com/userfiles/file/wobefe.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a51ec30b60a---15567549528.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/iu7ln1ddau6bk6m9dqrnhvbq05/1210992177.pdf
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a699ae4a99b---safirifutowexa.pdf
    • https://chiuman-hk.com/images/file/larewuwoduvojomamaxe.pdf
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/jm9nadqa30e0safqgucpo5dp51/30199141187.pdf
    • http://sns-russia.ru/userfiles/file/88831810078.pdf
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608586e377733---75702543962.pdf
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/13f85e13e5d14c3d2384bfc5fb8f0ba0/dufufixuro.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8ea18ea17---dulowatobosagisip.pdf
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a3ba3a00b3---44528251357.pdf
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/2a811346bdb60829555903758cdab7a2/rivumajotuposafegeseg.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/aek7p57cfok90b2emjdpa21ds8/lewadevesevewegenorutu.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087926c7ed84---nepafojurunivufut.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/fa93789387f74329e702ee511ad49004/78652102894.pdf
    • http://cambridgekapurthala.com/damana/userfiles/file/81541189192.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=usb+tethering+windows+xp+driver+download
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/859db29bf72711d6bfd3c79266f241ce/ketenikanubuvijad.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_off0000f157.bin
a1414b0fa589fc19a57c62f70915c5ff7231474ba73724d03c94ea3e68e7e334
pdf-font-stream PDF embedded font (sfnt) at offset 0xF157 11072 bytes
font_01_sfnt_off00010ac1.bin
1a596bae968369f71bad82f9e802dbc389b249d2842818206b36aab2cf43be7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC1 16740 bytes
font_02_sfnt_off00013674.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13674 16792 bytes