Malicious PDF — malware analysis report

Static analysis result for SHA-256 c97533e078268abb…

MALICIOUS

PDF

205.3 KB Created: 2021-06-26 07:18:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c9cc3317e6dd8a26b8f924a122476bad SHA-1: 2c6a46768f15afa6828cd50104856979fa787831 SHA-256: c97533e078268abb390fac0f92b3d1723fa4da8117e418fc9ec6f8a1f8bc50b5
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of an advance-fee scam. It contains numerous links to compromised CMS upload storage, suggesting it may be part of a larger phishing infrastructure. The document body is heavily obfuscated and unreadable, but the heuristic firings strongly indicate a scam lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • 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://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/38f58c38163d897b9a09d320c0fa4ece/detanitosakus.pdf
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a92b6c3161---50117214750.pdf
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/da0srk7gi640s6d34rqq4oisvu/gojobane.pdf
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/c2t4g6v73hk9bb5r1molfrmtp3/jojedimujukizusuno.pdf
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606d319704cbb---pejevagisamomatozup.pdf
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/1891a6284cab085f9a05525ff24e92e8/mobitodaxolog.pdf
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16079ab2b12156---95105653908.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/8qqrudu9s60j565q1g7683smi4/32084126491.pdf
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160afc08ab707c---19536850993.pdf
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/48ujcf9te88du3hjc3i1k64k6d/zurimanizixedovo.pdf
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8e3937858---47307150677.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086535678b12---sitisapipapapoponidifaf.pdf
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e266aabb6a---96202352714.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080fd3484759---gixugudaze.pdf
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a321bd15ccb---4177875764.pdf
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/b059e195dae0b2c5f549850126aa76c8/rovajakebufotinorumago.pdf
    • http://fygl.net/uploads/file/010634032678.pdf
    • http://aucoindeshalles.fr/menu/file/89770343747.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/5aeb1df93842da60ca4e6d663ec7a81f/fuvavivimoval.pdf
    • http://n2nlah.org/UserFiles/file/11830831474.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=types+of+literacy
    • 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_off0002c1cd.bin
4f33a0df47a384f78d8fac2cf9f5f4002484d6311fb7531c82549c84a08da1ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x2C1CD 10444 bytes
font_01_sfnt_off0002d9af.bin
e9c9947bdb2b597236a7aaccd030c98da414f0e373d66cf8f1d61f9512d8ba4b
pdf-font-stream PDF embedded font (sfnt) at offset 0x2D9AF 20636 bytes
font_02_sfnt_off00030e4b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x30E4B 16792 bytes