Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb59d00195053e77…

MALICIOUS

PDF

81.7 KB Created: 2021-06-26 04:09:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3ca07e76bc87599fbc9ef0e9c849c938 SHA-1: 3b7be19c58702fbe760b29f5f5737a56f0409567 SHA-256: cb59d00195053e77cbc8dc9944b1b99f6c4f6cfd063a02e221c2a2ebc6336621
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many pointing to compromised WordPress sites or IP addresses, suggesting it functions as a link farm to distribute further malicious content or phish users. The document body is unreadable, but the heuristics indicate a pattern of linking to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://alexandercdg.com/clients/36029/File/bubajubijubetebege.pdf
    • https://theatresaucinema.fr/uploads/file/silufepitozonejasi.pdf
    • https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/ddd25520dfd449106da0c825b87d5a51/66723270863.pdf
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160931bd74dd8d---somerutotijosulep.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088481746a9b---zerebukaj.pdf
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/fq3sj50hv4mrhd985o6629djtm/2505162421.pdf
    • http://upoart.com/ckfinder/userfiles/files/laloxubiwopukexogimuga.pdf
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/3dff0ee849d2e9d81307e27c5b44eae8/61875609724.pdf
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/3da1c2a33a1efde3861baac64f06e33d/97863820122.pdf
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b82ff624831---59291919558.pdf
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/4a2e0f7d446ae5a90b9af6fcc093b4f4/kabexexakipevoparusu.pdf
    • http://planbmedia.hu/files/dejigepizojekedepekawe.pdf
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b195087c0db---58469391037.pdf
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/392g33v5j5qjruf01r6jq4g1g1/dotokokowifemil.pdf
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16075d0dc062cc---27093228401.pdf
    • https://lesfeesdelhetre.fr/upload/files/82001588870.pdf
    • http://littlepearlspublishing.in/data/eimages/file/pikavajide.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4db6daec49---88200595884.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/ha511vc4q5nd5m8l1gkjqmjnjn/26751519284.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a02194fc51---58624527880.pdf
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a62993e45f3---38251231368.pdf
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/c9811157a4e0f59cd8f46ab0ef772e7b/1142487486.pdf
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c0426eeba---13877098556.pdf
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bc4d9b9de00---gijuxurodufa.pdf
    • https://alatheir.com/atheirwsfiles/file/xonanojipofoguturi.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7297dac906---degadubobisiburusopovof.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=creek+falls+state+park+tennessee
    • 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_off0000dac9.bin
d2a013ed4f086e034d23192b9ae525036b0076276d2490f94cd8a283eab65650
pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC9 17492 bytes
font_01_sfnt_off00010876.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10876 16792 bytes
font_02_sfnt_off0001208d.bin
ef550090d6e2db2ac0dcddf277e89c5b7485c003e448cad5a657d768c6aee05e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1208D 10260 bytes