Malicious PDF — malware analysis report

Static analysis result for SHA-256 0446566bf73945fb…

MALICIOUS

PDF

73.7 KB Created: 2021-07-18 17:09:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f92feadea44abadc7debb2e8f6e5b116 SHA-1: 5de1197533d016a8ce92742275347bdf0fa97a43 SHA-256: 0446566bf73945fb6e980c1d2d16ff90e9602b0d53d65c17fe43971c5f135305
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to multiple compromised WordPress upload storage locations and other disposable hosting domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites for further exploitation or phishing. The presence of numerous unknown URLs suggests a broad phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://magicfood-cn.com/files/20210704041310.pdf
    • https://dobre-akce.cz/media/files/file/zuwuderokasugikasasefa.pdf
    • http://alkanboya.com/files/file///wurotegebukawojedudo.pdf
    • http://wallsfamilyreunion.com/clients/876683/File/lusol.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/789b8a21749a002a936638a0c013e9e6/botasererisijudaxuvasa.pdf
    • https://agenciaboom.com/wp-content/plugins/super-forms/uploads/php/files/malmu23t76vnmub82g4qbfe8g2/vivax.pdf
    • http://worldnaturalfood.com/image/upload/File/51111619968.pdf
    • http://cedule-plachty.cz/files/file/88963489041.pdf
    • https://astek-telem.fr/userfiles/file/norigetosuxikisis.pdf
    • http://klpa.net/userData/board/file/kinabukilurewepapodek.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a38e0a99d94---27919456067.pdf
    • http://sbnjl.com/userfiles/files/xagatovalafakabedopek.pdf
    • http://inphilong.com/upload/files/21983304744.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160783ca743a89---97380275581.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/jn2r8q0kjbvcr05ehdaaftp7e2/zokijugowixe.pdf
    • http://livingkaneohe.com/userimages/36587150781.pdf
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/89bee699d25dcd769799b156e915fd61/xonawujisogosenugunege.pdf
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/c6e4b2e5dc99ab3fe6c812bc34d057fe/gusezaruzosaroz.pdf
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608786dcd2464---38705431275.pdf
    • http://siltherm.com/ckfinder/userfiles/files/dibevapuzer.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/3b665d1b028f02a9519939c3017df989/8679659987.pdf
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3305ad428---sipamewosafiz.pdf
    • http://imaginove.eu/data/Files/35495851129.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=full+episodes+of+a+love+to+last
    • 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_off0000bb93.bin
d8f6660dc81349050648d2f7c94686591157266e8f806e193d1489c16c6c69a1
pdf-font-stream PDF embedded font (sfnt) at offset 0xBB93 10428 bytes
font_01_sfnt_off0000d35c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD35C 16792 bytes
font_02_sfnt_off0000eb6e.bin
7bdb4ab889f43808da17fc1bd5fbe212488040263cf7e2ddcee7d6ad27cc3047
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6E 17132 bytes