Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc97cec84c165cf6…

MALICIOUS

PDF

144.3 KB Created: 2021-08-22 02:29:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fcd4fc5677d2c4bba62c39767b1b6246 SHA-1: 7f965028a889250b23a0554b7f82fc38a5b226de SHA-256: cc97cec84c165cf6609e1a355096adb8e7d32ecdf9bd7abb919a55a7430a81da
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to external sites, including those hosted on compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9726

Heuristics 6

  • 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
  • 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 http://perfekttorun.pl/pliki/watajaf.pdf
    • http://asclyziarskyklub.sk/userfiles/file/65475649512.pdf
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/3f9b0917b9a9b7dafac9a1e3f3883564/24467826075.pdf
    • http://thallo-food.hu/uploads/ckfinder/userfiles/files/43675273443.pdf
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/7abecf0afcf88f8e77babdab2feab286/99859363603.pdf
    • http://coffee33.ru/archive/file/pemevumarodi.pdf
    • https://ukmalayalamnews.com/userfiles/file/xedopipawuwubipepita.pdf
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/06d59809a1677f05a30a46782f200511/92688210989.pdf
    • http://melinterior.ru/userfiles/files/75028233738.pdf
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c1e83ac98a3---gagegawixeregab.pdf
    • http://murielbellhomes.com/userfiles/files/wukujafipogu.pdf
    • http://restravel.ru/ckfinder/userfiles/files/11562926925.pdf
    • http://preciz.com/uploads/wysiwyg/files/55389717174.pdf
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8f5f4851a---tajuwa.pdf
    • http://www.injamal.es/nueva/ckfinder/userfiles/files/54366623454.pdf
    • https://eyetracking.pl/userfiles/file/33094463942.pdf
    • https://stollerco.com/testingsites/advantage_aviation/assets/media/file/mivamazutuvot.pdf
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/77k95roki60ds0tch92kj3c1p3/wupelimesizokazumot.pdf
    • https://searchlink.org/userfiles//file/bivolor.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/70d1add5d5f38041146aabf6a04dffc0/19484869717.pdf
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/q0jpqljp2i2aaqcb3koc8nc4j3/woxuzupuragisuroxa.pdf
    • https://cualuoihoanmy.com/uploads/userfiles/file/palugeludokevabolerex.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609637a32b865---17474828971.pdf
    • http://chinalabware.es/d/files/jirotiwasifanodowezuruwex.pdf
    • http://citadelcaralarms.com/userfiles/file/nuranopijaweberoxuda.pdf
    • http://asfcursillo.com/clients/879797/File/womugupazokixevisupoj.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=8.s%C4%B1n%C4%B1f+t%C3%BCrk%C3%A7e+paragraf+sorular%C4%B1+ve+cevaplar%C4%B1+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b766.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B766 16792 bytes
font_01_sfnt_off0001cf78.bin
2eec35edeea02270c178afc1f917e606c44d690fcb88eece8d7de4ce053b5004
pdf-font-stream PDF embedded font (sfnt) at offset 0x1CF78 19776 bytes
font_02_sfnt_off0001ff2a.bin
28bfc58549ad332c638410af94f4fd10e64ba8d7cacb6c91f242988b9cfb5d75
pdf-font-stream PDF embedded font (sfnt) at offset 0x1FF2A 11572 bytes
font_03_sfnt_off000219f4.bin
27024b122eba49fd3fc1c2d8f22afa726925bc898800408e683f1b37f97f45a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x219F4 16120 bytes