Malicious PDF — malware analysis report

Static analysis result for SHA-256 696d8387b7e49873…

MALICIOUS

PDF

80.3 KB Created: 2021-08-08 04:29:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2ca1d1e6340a5c131efc0fa22f69c77c SHA-1: 431cdee79477fb0e31aa3bae066e071dcc0cea05 SHA-256: 696d8387b7e498732ae3ff3dbe7253b3d92e380f322dea309202045e358c6d24
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to compromised WordPress sites, suggesting an attempt to distribute further malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates a phishing or trojan distribution scheme. The presence of a link farm on disposable hosting further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2676

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://vintageguitar.ru/ckfinder/userfiles/files/paruzorisuliwokag.pdf In PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16079dd4270c00---20536536432.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-7-3/20210703053623786064.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083eadb1f847---79824706888.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb6466c88b---pazeseguwunenaj.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5311da83b---50012678567.pdfIn PDF document text
    • http://lyzebrno.cz/userfiles/file/rodaxurut.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/ot227qcrh2krmjeam8igonfkip/walosufazorepupolojavu.pdfIn PDF document text
    • http://wedding-ideas.ru/ckfinder/userfiles/files/zoguzipemopozominese.pdfIn PDF document text
    • https://pindimana.in/uploads/file/vufixelenugalokove.pdfIn PDF document text
    • http://currycornersugarland.com/admin/images/file/vekesoxese.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f1426b126---kagikixelaruw.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/o9okdkr3v8tal694qiugsh5jt0/56927438725.pdfIn PDF document text
    • https://cafeau1ait.xyz/js/ckfinder/userfiles/files/garulaganavivanunus.pdfIn PDF document text
    • http://st-johnson.com/Uploadfiles/files/ralugibujug.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b497917b98d---67573611824.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5feaee593---39673432181.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e875cad524d---wiwumaxupujarenorabaratu.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609b33cdbe1d3---vexefowibuxaxilirib.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/0f7ca45ad2864e5f8104ade5d4640ae6/52372378101.pdfIn PDF document text
    • http://sgadsahodayatarntaran.org/sahodyatarntarannew/userfiles/file/45512239320.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16081c59f80d65---jeriwopelufutek.pdfIn PDF document text
    • http://elyriahigh1974.org/clients/0/05/052ab20d644b737728595af1a47b4450/File/96500070346.pdfIn PDF document text
    • http://elitacasa.it/images/file/63287047372.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/df17e63d2e9f458bdad1506995326835/14265974280.pdfIn PDF document text
    • https://www.anandtirth.com/wp-content/plugins/super-forms/uploads/php/files/5rk0ims6ck75isu4da83tg1753/xixekabepirisinabifuweg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=how+do+i+reset+my+speed+queen+commercial+washerPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF031 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10848 11216 bytes
SHA-256: 45ae5f97d4dd4814f82d453441cea2470e34ffc8c81adbe7b5691b0812a7e9b8

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