Malicious PDF — malware analysis report

Static analysis result for SHA-256 958b0c4d3887bdb2…

MALICIOUS

PDF

90.0 KB Created: 2021-08-21 23:29:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e3466e253fa73f63359c98f42a82d25d SHA-1: 6c3a665ce5cc860dac2f2109056cd4a456508892 SHA-256: 958b0c4d3887bdb278a8a7abf429e6af197fe77dda20cd2bcea62642cdffe152
124 Risk Score

Malware Insights

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

The file was detected as a phishing trojan by ClamAV. Static analysis revealed numerous external URLs, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users. The presence of these links and the overall structure indicate an attempt to lure victims to malicious websites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2664

Heuristics 5

  • 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
  • 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://synerhu.ru/uplcv?utm_term=what+does+pine+mean PDF link annotation
    • https://bruceleevideos.org/images/file/fewuligaz.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/8901685242.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d6f9974ec---rilisulokatufimatuxomavax.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16070340087b60---1242392636.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/67985149533.pdfIn PDF document text
    • https://copperscraphandlers.com/ckfinder/userfiles/files/wusanazufeluzozuvaxi.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160f1a56b9a290---91276191277.pdfIn PDF document text
    • https://mtestbd.com/assets/uploads/files/badaloke.pdfIn PDF document text
    • https://avflash.nl/upload/files/wodofulozupa.pdfIn PDF document text
    • http://tokstar.com/_UploadFile/Images/file/65577619856.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b87d2d523---bajovurotumavibenowavafo.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/1029357530.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/2da5f506925737c83ee3f4933c6a2d4c/jatininirepul.pdfIn PDF document text
    • http://zzweien.com/d/files/sapeboruvopufumas.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/womojukofan.pdfIn PDF document text
    • https://netlandschool.cl/files/gixagateva.pdfIn PDF document text
    • http://starlightcelebrates.ca/clients/4/43/43e9139217482d7666ce300faf566241/File/30562605775.pdfIn PDF document text
    • https://bisnismedsos.com/userfiles/file/74588034921.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/6a705f5a3ca901e28c9ec4d6ffb18f31/96991558786.pdfIn PDF document text
    • http://changrung.com/ckfinder/userfiles/files/vulonewukalat.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fa7e0b24fc81204d06c10e66f76ed089/lezutimot.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/l3vol1fpoj1bal2ch54d22hjdn/47462244328.pdfIn PDF document text
    • https://baobihungphu.com/media/ftp/file/8650184309.pdfIn PDF document text
    • https://valerart.com/ckfinder/userfiles/files/xevapuvomiz.pdfIn PDF document text
    • 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_off00012fbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FBD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000147d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147D4 10504 bytes
SHA-256: f22f60c590fda5be8053e1b6da3f3972e26fe9fb3a78310401ebff3495bed55a

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