Malicious PDF — malware analysis report

Static analysis result for SHA-256 280923f1710e37ac…

MALICIOUS

PDF

61.3 KB Created: 2021-06-18 13:32:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: df7b70652e77ece3df753be5f2cc3e49 SHA-1: 4cf5c7862a9252a32136fef21bf35e6064cb4ef0 SHA-256: 280923f1710e37acac6d89a8736fce8111ed9e38d144ace8087895579bb40a62
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links pointing to compromised WordPress sites, suggesting it's part of a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the structure and heuristic firings point towards a malicious document, potentially leveraging embedded JavaScript for further actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8763

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://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/e1baec9ad9c0259786168fc3eed4b05c/57627558667.pdf In PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/c7l9838bdirlenio16m62k33k7/jizotejodadaranisovijor.pdfIn PDF document text
    • http://bscartridge.com/pic/guwigeret.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608ceb6c6a065---kakibusijutubi.pdfIn PDF document text
    • https://fallsplat.se/file/42385214321.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6bb5dceeb---21799513289.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc63c9461d---bofan.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/lnpf0s6ogguvk2ol36m86hshao/simiwarepim.pdfIn PDF document text
    • http://crescentcarpets.com/userfiles/file/71475207794.pdfIn PDF document text
    • http://tanriovermensucat.com/uploads/genel/files/78453439627.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a34a8f7f771---42984372685.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/16089912ca9b66---nutimefuludunolekuwuke.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092fb589cfe9---rixegasin.pdfIn PDF document text
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/fmcrp61spbp6ph51ik3lkt0vv3/wusolasedekafigitisejafi.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-5/file/pibagufasuxitimog.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/devipigemiwelokovijo.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608167241fe3b---79591619040.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=mine+bazzi+download+mp3PDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB741 2960 bytes
SHA-256: 495dc75d95a6a6f45ac0640accda880cdd7226211fb355277ff836c691f61857
font_01_sfnt_off0000c1af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1AF 5280 bytes
SHA-256: 373cb2c860fcd749460fdab5b4bbf7572fb61fda6e45e6d27f945292b5b26cf3
font_02_sfnt_off0000d3ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3AD 6824 bytes
SHA-256: ec2b1524a6c152c1a253c68532d76d5cf28a16e14f9a6e7c4c3b779316ca3423

Open this report in the interactive analyzer, or submit your own file for analysis.