Malicious PDF — malware analysis report

Static analysis result for SHA-256 07da035953b3f83b…

MALICIOUS

PDF

87.7 KB Created: 2021-07-02 02:54:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7efa63a66beb8b4fcda748727d8f70a0 SHA-1: 1664fd26fff685605a396a0656b1c5d4cd3cd16b SHA-256: 07da035953b3f83b7b9cfaecf3cb06346cf75051fe318db41b6c7e29615e4def
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam. It contains numerous links to external PDFs hosted on compromised or disposable domains, suggesting a link farm designed to distribute malicious content. The primary purpose appears to be luring victims into downloading further malicious documents through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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
  • 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.
  • 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 https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/707f2912582ebda14f007ef76ddb278e/xejinoripigigolixap.pdf
    • https://sasalidayanisma.org/uploads/file/75677265829.pdf
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/78f7032d43c1d103f0c9068390902dd1/zavixijuzokefowe.pdf
    • http://asremajazi.com/uploads/files/xabakupuretekonaj.pdf
    • http://tscyw.net/userfiles/file/20210615195743_dg8rcb.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16070ecd9c3685---wakeg.pdf
    • https://ludifrance.fr/userfiles/file/5104496573.pdf
    • http://sherwoodchambergolf.com/ckfinder/userfiles/files/niwunujo.pdf
    • http://ingmontagna.com/userfiles/files/63897999310.pdf
    • https://vate-tire.ru/wp-content/plugins/super-forms/uploads/php/files/ad6b44fff608527378dcec19694a3768/regubonofifaparelap.pdf
    • http://csc0351.com/userfiles/file/20210628213540_ays2nd.pdf
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/rp6hr81csu4jsai83pnrchk5v4/poropepofeli.pdf
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16082cc5827b18---zavifutebukukizeduvofe.pdf
    • http://tnslib.net/userfiles/files/5059406057.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af95b09df0---nikodorafotukexiruvidorat.pdf
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/k4g934l20p2jchcbl1d7fmseph/vunamugupuzegunemuxafuxir.pdf
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/979ca07d259770951831eecfeaa7fb9f/25641062969.pdf
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/ktinf2bh19s1jnmsokbvutfu26/binikig.pdf
    • http://dansensvenner.dk/imagesfile///48490449213.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/eff0d73147a77b29601f19367526c62b/21415795305.pdf
    • http://shsalumniauditorium.org/clients/f/fa/fa32e32112b7cad64a7d7e78b95ed61b/File/lifumedumon.pdf
    • http://www.ecostroyservis.ru/File/65471946075.pdf
    • https://chameleoncoupons.com/adgprocessing/uploads/files/92001814444.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=1+serving+of+brown+rice
    • 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_off0000f3cd.bin
76fad1c01d93847bcb8ee7150497bcd7ed89b43b89b93f7f45079dee5ed5aa0f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CD 10452 bytes
font_01_sfnt_off00010bbc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BBC 16792 bytes
font_02_sfnt_off000123ce.bin
7ff291a6dfaeeb4888f281a16ab9a97771664d56e6e99a5d7037055e36f60fbf
pdf-font-stream PDF embedded font (sfnt) at offset 0x123CE 17612 bytes