Malicious PDF — malware analysis report

Static analysis result for SHA-256 df5d430a4db5e18e…

MALICIOUS

PDF

79.6 KB Created: 2021-06-25 16:33:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 87178ff76beb841375a8782eb2741b4b SHA-1: 2b189e98926b4adcbd34c90370b3ef460709f033 SHA-256: df5d430a4db5e18ec5831a1bdb166901cf4df11f90f8e952d9c5e1a4b2c3de9f
224 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of an advance-fee scam, including language related to lotteries, prizes, or parcel deliveries. It contains numerous links to external websites, many of which appear to be hosted on compromised or disposable domains, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 9

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f94c4e5597---wasonadipifozozutivesidub.pdf
    • https://ckmandarin.com/uploads/24743115444.pdf
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/c051f56860c2b35657dcaacdb2348a7e/tukusiruzexuzawafagide.pdf
    • http://dichvuwebsites.com/media/ftp/file/joxusirofivaxusawadipix.pdf
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/0cc879215b9df4d6696163d34db576ff/tepijon.pdf
    • http://libertyquad72.fr/userfiles/file/pozoxasa.pdf
    • http://paitoonbox.com/userfiles/files/wufuv.pdf
    • http://rszm88.com/upfolder/e/files/20210605051907.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160848d7547d05---kagizavekane.pdf
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/8a686defe38440ce81d6c951104f6754/60502483466.pdf
    • http://ankurgroups.com/userfiles/file/gibekebavitutoti.pdf
    • http://modamoda.nl/uploads/pic_lib/file/bavodonipugezetezaxuxikug.pdf
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/dbef5861fadbfa215d6714f80f683b56/75324990674.pdf
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/c5e684509b9adae8fc91560260c9eceb/pedelet.pdf
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc54f7633ad---vajurumofam.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=north+myrtle+beach+county
    • 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_off0000d323.bin
a671afa0a3c37c5dec92a261ce6b5a25b664045463d7d06321cb74eec389ffa0
pdf-font-stream PDF embedded font (sfnt) at offset 0xD323 10568 bytes
font_01_sfnt_off0000eb1d.bin
96984c13b04516f51dbcfbdd9d5b31629ee0f6d4771686e993110be9e73a6116
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1D 17672 bytes
font_02_sfnt_off000119b0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x119B0 16792 bytes