Malicious PDF — malware analysis report

Static analysis result for SHA-256 15532929b7769ba9…

MALICIOUS

PDF

306.7 KB Created: 2021-06-28 05:13:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 67cd489c52db6bc51c16fd2321c83151 SHA-1: db4f0671db74e9518fa06acb22f0254e9f897133 SHA-256: 15532929b7769ba9568fbd50a82bea93a2bdd62b7a7c8a49705cb147491988eb
174 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam and urgency lures. It contains numerous links to compromised WordPress upload storage, suggesting it is part of a larger campaign distributing malicious PDFs. While no scripts were directly extracted, the PDF structure and embedded links indicate a likely attempt to exploit vulnerabilities or trick the user into executing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9894

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://romanakladatelstvi.cz/userfiles/file/54398929910.pdf
    • http://drwatsonsr.com/clients/2/2b/2b9a0cf27321ceab3a47fbd10bf94d34/File/nuruxameduxawosu.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160782c3278a91---jagerave.pdf
    • http://fotocaroli.it/userfiles/files/64162171517.pdf
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4bb4c6d81---86721948743.pdf
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ea3a4d194f---ladaxazoxap.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0e683c7aad---rajavetifamikefetuves.pdf
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609f97c01687a---64839945998.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/2a321a0df61f294f851e0fb12a9e234f/15042372438.pdf
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/29rrp3gs4judem5nn9bgocepr8/28709845931.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9798d5de87---89188130122.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac707455bd---poxetelifepuwitejap.pdf
    • http://au-zlato.sk/upload/files/lufunexarelesavedakozex.pdf
    • http://blessingsngo.in/userfiles/files/30274052144.pdf
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/f24bf470bf3ffd9da88b530904503631/77786646577.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa594487e0---22908949471.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/4o626tci7r30fnqmv93psqlo04/vabunezezi.pdf
    • http://cesishotel.lv/res/wysiwyg/file/73077120053.pdf
    • https://dovolena-jiznicechy.cz/uploads/fudegutapoletofisela.pdf
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beebbc5dacf---lekagezawagivifozaso.pdf
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a8d46ef57b---baziretisazelamidojonu.pdf
    • http://southport1969.com/clients/861680/File/6414530139.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=h2o+h2s+h2se+boiling+point
    • 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_off000449b4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x449B4 16792 bytes
font_01_sfnt_off000461c6.bin
94e094967877ff09a5b37c2ed4b8dbd150310fc17bbba7ff226a16271cc11d99
pdf-font-stream PDF embedded font (sfnt) at offset 0x461C6 26228 bytes
font_02_sfnt_off0004a4bf.bin
38512c3ae5a05886cd6c958b251f7f37bba2231de1a0b598fee10c92c64e63b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A4BF 10520 bytes