Malicious PDF — malware analysis report

Static analysis result for SHA-256 af268b9f1837cf4a…

MALICIOUS

PDF

91.7 KB Created: 2021-07-07 15:51:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 951317858082c54d61c27fe24d586ff7 SHA-1: 54e9a6b58f318aae023f3e231e1a3a94d253a2cb SHA-256: af268b9f1837cf4ae4a08d3864df10d022ae797c3d94f258a7fd7d48201d1601
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many of which are hosted on compromised or disposable domains, suggesting a phishing or malware distribution attempt. The presence of a visual download button further supports this, aiming to trick users into downloading a malicious payload. ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 8

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://chp-travel.ir/data/file/33199780709.pdf
    • http://www.knickmeier.net/images/pageimg/file/pikoteririsejaw.pdf
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/e3f5848b800fccf866e6678137758705/bekufupivepejumafivu.pdf
    • http://thaoduocquyhiem.com/userfiles/image/file/50344391937.pdf
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16220274940433.pdf
    • https://aduanaldelvalle.com/userfiles/file/vonunalerisedulupa.pdf
    • http://beateromer.com/bilder/file/bibume.pdf
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/il1vni96vnd6bp9t2uh7hkf6fk/28718592353.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a4e5607f5fc2ab035280a09e2e951c4d/60166962773.pdf
    • https://remoteyourstaff.com/calisma2/files/uploads/ditedesinapaborapodow.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160812716b8531---lebajasemoromewewapa.pdf
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/6d8e97da4dcd4b609a37eeb90b0cef83/tiwilifexe.pdf
    • https://invest.pl/userfiles/file/vareki.pdf
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/ep8ca1d89esf6k0fb6c7sha2op/39672309909.pdf
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/b4d802877d1ae946a21ff09f4ea12316/52517720395.pdf
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/6d9bcsfhhg66akdvjguk21hbl3/40889839911.pdf
    • http://aweibel.com/Photo/file/luzinotujolavelib.pdf
    • https://ambulatorioveterinariosismondi.eu/file/55057821293.pdf
    • https://kawanmto.org/contents//files/96486006797.pdf
    • http://recrute.fr/files/files/wovamuxibewulivavojeso.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/26cc552b6299b245b9b7d90b6407e286/13197659874.pdf
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/njcfemeon3k8ki54bm7jqasrg0/nutajodemeso.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/90b6148384e42369fb003b238862a156/larosizusanakeroso.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb746773d1---zexit.pdf
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160860f3e82b6a---dalilalexesalejopiruvejum.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=starfinder+character+guide
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010554.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10554 16792 bytes
font_01_sfnt_off00011d66.bin
4d0d924ed68cf25f154c5205159715d35a12857f909ebced5a5a8972914a38cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D66 17028 bytes
font_02_sfnt_off0001498b.bin
3b7ee2893c15bbfff28954f57532e429c9f806fe088e27fca81f7a1ce7fb1ffb
pdf-font-stream PDF embedded font (sfnt) at offset 0x1498B 10596 bytes