Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0c6892265dc124a…

MALICIOUS

PDF

102.6 KB Created: 2021-09-21 02:35:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: bc51e1c755032a0e0f2f9e5ed7031f23 SHA-1: 513f9eca88d3e4bcddda03bab73b9ab49a33f553 SHA-256: f0c6892265dc124aa1b2c0ded37e905d26069507f76207597e030fa920d99be9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm pointing to multiple compromised websites, suggesting an attempt to distribute malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. While no scripts were directly extracted, the presence of numerous external links and the heuristic findings indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4169

Heuristics 6

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://sofahatinh.com/upload/files/sutuzusawemowok.pdf In PDF document text
    • https://reha.bg/content/upload/file/87683050847.pdfIn PDF document text
    • http://cioccolatogallucci.it/userfiles/file/40171162852.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/161432f452dc1a---90840975334.pdfIn PDF document text
    • https://mbzl-pro.xyz/web/img/podborky/files/lobajolimesedasewarasuren.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f49ed2a07a---43882139754.pdfIn PDF document text
    • http://trieuduong.com/images/Download/49955828580.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161337b1ec0e67---36137704026.pdfIn PDF document text
    • http://muacuoi.vn/Pictures/files/73504425561.pdfIn PDF document text
    • http://yanarfabrics.com/firma/files/vedopatani.pdfIn PDF document text
    • http://namhungholdings.com/uploads/ckfinder/files/fukusimukiwetopifovijexi.pdfIn PDF document text
    • https://bold-iot.com/uploads/files/202109020558241461.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/a3729f59f6ab78f468dfbe7de1d065bf/8241840367.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/16139ab3ba7ff0---rabipirunumixogemavijudet.pdfIn PDF document text
    • http://nwhouse.ru/uploads/file/49430731978.pdfIn PDF document text
    • http://etyekilovarda.hu/userfiles/file/funomopajuzuguronotev.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/dovalojofemur.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d72d21083e---napuxibiwugelibatasus.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/qhnbk9e3pr0i37kp1kmv8u6442/rovisunosebevone.pdfIn PDF document text
    • http://officinedesign.it/userfiles/files/gumowatigitasi.pdfIn PDF document text
    • https://mcdelandes.ca/uploads/file/fazarerifudit.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614906adca229---besaragi.pdfIn PDF document text
    • http://stuarteisbrucklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/doxulomi.pdfIn PDF document text
    • http://bhavalaya.org/ckfinder/userfiles/files/32824341669.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=csr+racing+cheats+8000+goldPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011db5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000135cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135CC 11012 bytes
SHA-256: 729dafdb96d32caa8eca4f503ffd68eb09e86b716aead495b6ef25981cef0569
font_02_sfnt_off00014f20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F20 16180 bytes
SHA-256: c0217721a1102ad1f8a8ff5461faadb02f26a3634bfe128d67f68b25b112ee8f
font_03_sfnt_off000164c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164C5 19420 bytes
SHA-256: f50ad0d3b2dca09c996b3e096488308ce848c20b2ec1a70152ab6cffe6cecdba

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