Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2abe0601c4e77a1…

MALICIOUS

PDF

74.5 KB Created: 2021-09-09 15:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 87557b38e5c4c8450806b69a578ece1e SHA-1: 9e8f16578e226d16ecec10362bcfe8c7d766fd80 SHA-256: b2abe0601c4e77a111d59903c046434de1b28e69a4929873a631b625f39e6713
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to link farms, suggesting an attempt to redirect users to malicious sites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a deliberate effort to create a large number of links on disposable hosting, reinforcing the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://www.allduniv.ac.in/ckfinder/userfiles/files/82989833255.pdf In PDF document text
    • https://ddnepal.com/assets/userfiles/files/10408775874.pdfIn PDF document text
    • https://cdmsig1.com/ckfinder/userfiles/files/30083192302.pdfIn PDF document text
    • http://eminenceinc.com/userfiles/file/xatejalemax.pdfIn PDF document text
    • http://boothbayharborshipyard.com/userfiles/file/19872600662.pdfIn PDF document text
    • http://xn--80aer5aza.xn--19-kmcm3c.xn--p1ai/ckfinder/userfiles/files/foderugavagugegek.pdfIn PDF document text
    • https://madame-tina.com/ckfinder/userfiles/files/giniwojipiriremaj.pdfIn PDF document text
    • https://camphacement.vn/upload/files/pawinuvuvibuwipajepodajis.pdfIn PDF document text
    • http://lagostena.it/userfiles/files/10420646896.pdfIn PDF document text
    • http://fkjz.cn/upload/files/2021/09/202109071744122189.pdfIn PDF document text
    • http://gutachterbewertung.de/userfiles/file/sizepoxafofokived.pdfIn PDF document text
    • https://bandotrading.it/uploads/file/42127551801.pdfIn PDF document text
    • http://isystem.hu/userfiles/file/78150324726.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613252906aa02---50783423369.pdfIn PDF document text
    • https://topupdana.com/contents/files/zetubusejiwamubijulosake.pdfIn PDF document text
    • http://aimic.com/userfiles/file/19886354290.pdfIn PDF document text
    • https://buzascsaba.hu/userFiles/file/vukefetovup.pdfIn PDF document text
    • http://mawaevents.com/uploads/file/jawesarik.pdfIn PDF document text
    • http://enjoyisagenix.com/ckfinder/userfiles/files/5621800242.pdfIn PDF document text
    • http://kxqcgs.net/filespath/files/20210902061722.pdfIn PDF document text
    • https://windscrm.net/files/file/58748305036.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16135924338cb0---72955770380.pdfIn PDF document text
    • http://meandnetworking.com/ckfinder/userfiles/files/84424529221.pdfIn PDF document text
    • http://gorod-r.com/userfiles/file/32725143649.pdfIn PDF document text
    • https://www.fishhabitatnetwork.com.au/application/third_party/ckfinder/userfiles/files/livemukojavavagivap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=instagram+free+auto+followers+appPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0E6 10744 bytes
SHA-256: 941ed58039047228f50260f2c2401562f94f8f5cb3bd3f6b24b45059b2d34a07
font_01_sfnt_off0000d9ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9AC 16532 bytes
SHA-256: ca8c401ce9c6821a99d20dda61c19b27c8b02720d7d27178c7b873330ebc8948
font_02_sfnt_off000103ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1