Malicious PDF — malware analysis report

Static analysis result for SHA-256 a42df23007c05735…

MALICIOUS

PDF

76.2 KB Created: 2021-09-04 13:46:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 52bc5e87743ac57b78ec76d11e8e240d SHA-1: 851d1565765639687ae46db873e9854526cf8f00 SHA-256: a42df23007c05735950a37b3e41ea0153cc19e33b128d6d3dd3dac016b80d971
124 Risk Score

Malware Insights

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

The PDF contains a link farm designed to mimic search results for software cracks, specifically mentioning 'wondershare pdf password remover crack keygen'. This heuristic indicates a phishing or malware distribution attempt. The presence of multiple links hosted on compromised or disposable domains further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4750

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://goodwill.pl/userfiles/file/tiletigaxudux.pdf In PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/2e2f7402b0023a9b5bd967714bf2680b/fufotikapitalavis.pdfIn PDF document text
    • http://kientrucnhacuagio.com/upload/files/lakajew.pdfIn PDF document text
    • http://dobre-jaja.com/Upload/file/6176432179.pdfIn PDF document text
    • http://hanyangsteel.com/files/fckeditor/file/12157163456129384029a76.pdfIn PDF document text
    • https://tideandtigers.com/ckfinder/userfiles/files/41639105963.pdfIn PDF document text
    • http://msinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/90758026092.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609426ea6610d---bevutexowukelulomokojoj.pdfIn PDF document text
    • http://studioprogettoarchitettura.eu/userfiles/files/55884488493.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/7567282154bff23bb8861a067c6e1ec2/bazubezodegix.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/tfup6je552rgs8qn0o74o5uo98/82375791135.pdfIn PDF document text
    • http://etenindex.nl/images/uploads/jerov.pdfIn PDF document text
    • http://chatfieldfarms101.com/userimages/70749908709.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/98a03d5c935a819734c746cfaeb57213/zikajusabof.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/qlcq3agtl7ocom9mummn7oprh4/57027512193.pdfIn PDF document text
    • https://optimuselearningschool.com/learning/site/images/uploadfiles/54872130922.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609846e430f62---88116682955.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/rk7f90dsdjguqd6phq35pflu8o/sodazifanadinikudis.pdfIn PDF document text
    • https://snqrsl.quebec/upload/editor/file/561278231.pdfIn PDF document text
    • https://szaniterplaza.hu/ckfinder/userfiles/files/bixesixazefirimikebuga.pdfIn PDF document text
    • http://hungbuloon.com/media/ftp/file/47395504570.pdfIn PDF document text
    • http://collegium-connect.nl/ckupload/files/45216192907.pdfIn PDF document text
    • http://www.huntsvillepr.com/files/files/nisosomo.pdfIn PDF document text
    • https://123natura.com/stockages/files/89728125591.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=wondershare+pdf+password+remover+crack+keygenPDF 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_off0000d952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD952 11184 bytes
SHA-256: fd850b0c7ec59b96f3b7e624c0cf9c0265b9f99e6caf5d4f214cdef085deef2b
font_01_sfnt_off0000f330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF330 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1