Malicious PDF — malware analysis report

Static analysis result for SHA-256 a62334902d98284c…

MALICIOUS

PDF

69.6 KB Created: 2021-09-04 22:47:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 8fa75654a8f8a9dd2981cf56df7f26ac SHA-1: b805b20b5c316daecfe6fa13fd9d92add62f596f SHA-256: a62334902d98284c27669f8deba2eee85971836ba53f440c2c3c8b7be591c0c6
124 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs hosted on various domains, many of which appear to be compromised WordPress sites. The ClamAV detection and heuristic firings indicate this is a phishing or trojan distribution attempt. The embedded URLs are designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2573

Heuristics 5

  • 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
  • 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.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608590b7ca009---64541990442.pdf In PDF document text
    • http://ozgu-yapi.com/firma/files/mimonowiguxax.pdfIn PDF document text
    • https://thefertilizergranulators.com/d/files/dezufodakufumitefoxum.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ab025812d---27973060544.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c2d2b8f1c89---pokonojurekonadodademuxud.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/2a438681f096bd61f77a05a5cdddd471/31316517546.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/55974fae0fbe66b6c6d71cec7e959bdd/pazewip.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/96d89af139d18731138e971000ebba18/49044338228.pdfIn PDF document text
    • http://tuhocxuatnhapkhau.com/uploads/ckfinder/files/bovofeg.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b24afe85ff---jikabag.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1611b78e41b6f8---roxunebos.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/ef40215481c657dc89c62dc8cbdf6c22/faxuzulumumiposi.pdfIn PDF document text
    • http://bartuceviri.com/userfiles/file/77056674019.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607977f9676ec---sifomifopovemebaz.pdfIn PDF document text
    • http://se-ty.ru/uploads/userfiles/file/lisanu.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f976ecdbe93---talep.pdfIn PDF document text
    • http://se-ty.ru/uploads/userfiles/file/gojuligaxukinipodaluzozo.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/0f4332033a03ff962e5d2a698a50e5b5/72808951600.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/zulugizekavunekin.pdfIn PDF document text
    • http://www.hon-ro.hu/userfiles/files/39595539485.pdfIn PDF document text
    • http://canyonoaksmtg.com/~duckdi5/canyonoaksmtg.com/content/file/fizexilefaxabodo.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/5663063830.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/tr7tkhhiprtrdkvjnbfre92lj4/24768176654.pdfIn PDF document text
    • http://dajuicebarus.com/uploads/files/78882249296.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d1a57bd00---nanenijinofumozakegisugo.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/d3367cfbad02c0675976c40aabf5e125/lowodolat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=bomba+para+fumigar+manual+home+depotPDF 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_off0000c8a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e0b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B7 11068 bytes
SHA-256: 76435f3e0f1f1716dbaad22c62732b1ff6755e1abd4b28561fd908b1770a5b58