Malicious PDF — malware analysis report

Static analysis result for SHA-256 82ab1f2a177a2339…

MALICIOUS

PDF

80.4 KB Created: 2021-07-01 10:58:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 15ee38e44561aedd64a01a760f7132e6 SHA-1: fa0a6200300a3f103326c1fe2ced4256be11e0f0 SHA-256: 82ab1f2a177a23397589f81b5719397565cdf5ec50005e75d5d8b0afc78f1efb
124 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS upload directories or appear to be part of a link farm. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent, likely to redirect users to phishing pages or facilitate further compromise. The document body is heavily obfuscated and does not provide direct clues to its purpose.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4208

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 https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/jmvbla6n6a398jnc7ja3njlor5/mivokodizuziwalujotir.pdf In PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/de58b9f31beda6703abe773d4af0c354/jorukosoxuxato.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/kiwiwof.pdfIn PDF document text
    • http://grandinspirations.com/clients/75274/File/17638408871.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/4sdssg1gkg6hl2ktg1u6h60ab4/lipuzaxalejejuzafojol.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/85355627b758c45902b76433fdcf4d1a/59130528141.pdfIn PDF document text
    • https://thai-airpark.com/ckfinder/userfiles/files/15152694795.pdfIn PDF document text
    • https://akamercedes.com/images/uploads/files/pemune.pdfIn PDF document text
    • http://yakutiaprime.ru/SITE/files/editor/file/mederasalomosonosavufu.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/7cda1483b159f48d51887c5dbf612f04/85159993819.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/kigakarudasabare.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca0571385a1---jonaxikagipo.pdfIn PDF document text
    • http://jiuxingchaoshi.com/uploads/file/310850474575.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/23665227856.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8d89486df0a296a915957303d2c35d4f/28625404294.pdfIn PDF document text
    • https://seeandhearbetter.ie/img/shop//contents/14846806707.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/db4c3618abc0395d91426e5cd71e0a5f/xusofusixeminugilikimu.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/cba118333f599b06e0a7fac47e1dacc9/41266866545.pdfIn PDF document text
    • http://sonkertrail.org/clients/9/92/9260a3c387aed4615f72c72c3a1da295/File/dokasinotikorovu.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/59682b1eaeb10fd0527d3f9e0e12d0f5/86198186506.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/0a4a413f0ba711184e89516e34a88f75/sukifasuzu.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/55478626149.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d27445561d---lixanozuja.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/f7691cf7436dcd94b971884298fdf762/58940023986.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=example+of+lean+canvasPDF 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_off0000eac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC4 17168 bytes
SHA-256: b2abcfe17c27771c1e4b7a5b298ab911a7444ceea59ece1878d594003c3d5697
font_01_sfnt_off0001178e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1178E 10500 bytes
SHA-256: a708a142727e389b0808a9e7d9272ba0dddcc412c9980356f31afcf4f0722bb4