Malicious PDF — malware analysis report

Static analysis result for SHA-256 62d2b2893340ed34…

MALICIOUS

PDF

95.6 KB Created: 2021-09-03 03:07:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1124349d6cca35badb9dad312a10fa40 SHA-1: bc69d77ada4779f7c76bb010208e5117b0b02120 SHA-256: 62d2b2893340ed34289123b3e7b63ef1f3e8cc98a49f79c77bf614cacccf5098
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to external resources, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure itself is used to host and present these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • 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.
  • 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://abwlanham.com/uploads/files/89102783161.pdf
    • https://renetravel.ro/images/files/tipuxijemadigesikozefujas.pdf
    • http://dancephoto.ru/userfiles/files/biwemomozitunafubenopi.pdf
    • https://arerp.kr/data/file///vigulepepasot.pdf
    • http://nuestratierrapremios.com/campannas/file/51686496443.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a87f2871c---muzila.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102fe44b22ba---72109835591.pdf
    • https://beautyyaurient.com/editor_upload/file/zosodopobib.pdf
    • http://4chan.ro/UserFiles/file/jegajanagorebetunarala.pdf
    • http://ambulatorioveterinariovianello.eu/userfiles/files/levulemelimilebuperuxo.pdf
    • https://alhurwallpaper.com/Files/files/10326582374.pdf
    • http://nusamulticentralestari.com/Uploads/userfiles/files/kotebanovurekukuzulew.pdf
    • https://506hlapeta.com/files/file/6720417560.pdf
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/01fafe75731f4994badb4464a55426f2/97434437124.pdf
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/0cde8693079f36bcdba708fcaebddc19/raxiwulesajedoxurik.pdf
    • http://sanzmendia.com/userfiles/files/fitasewopegulalesazexag.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6015122139---zotogulibuwabunupidot.pdf
    • https://giriconsultancy.com/content_files/files/towawopexepadi.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160717eac35586---sumov.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1543d95976---raxovidu.pdf
    • https://eccdc.org/application/webroot/userfiles/file/jojifixabo.pdf
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/df0743c18ae50845d6406ba26350dc7f/3992306210.pdf
    • http://abc-tel.ru/data/File/zezutojazuwipironiv.pdf
    • https://onhimalayas.com/ckfinder/userfiles/files/lexize.pdf
    • http://minutemen-jrotc.com/clients/84940/File/rulemixogogi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=smart+home+definition+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001119d.bin
30185d72ec5c6085277e235d7b29b74917401d4058c2246dd5c6637bf3d88402
pdf-font-stream PDF embedded font (sfnt) at offset 0x1119D 18204 bytes
font_01_sfnt_off00014057.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14057 16792 bytes
font_02_sfnt_off0001586e.bin
ba0c9d73bbaa45e6a34ac3900907117d34505277001905e192acc740d96f398e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1586E 10624 bytes