Malicious PDF — malware analysis report

Static analysis result for SHA-256 01d48f1ebf3912a5…

MALICIOUS

PDF

101.9 KB Created: 2021-08-20 11:34:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1722cc90c37e0d24f8b7010d8b2ff59e SHA-1: b9989d7f87f5da345417c338236cea78e39f829c SHA-256: 01d48f1ebf3912a5e409bf1c2dfe3892fb57f8c81ffa6ae687ce38d19fc18d4a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URIs, many of which point to external PDF files hosted on compromised or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of an IP literal in a URI further indicates suspicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9896

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://happy-travel089.com/CKEdit/upload/files/patuvujegipadubij.pdf
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610d6c2b4cbc1---29307907374.pdf
    • http://location-venise.com/italie_documents/files/28462614286.pdf
    • https://newshieldinsurance.com/demo/gsa/final/images/file/50011018543.pdf
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/49926a8ef0c4ad9c92c9b851701764bf/40504682757.pdf
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16103565b0d0a6---bijofujevukodivu.pdf
    • http://hyundainhapkhau.net/upload/files/80060499538.pdf
    • http://goodmix-psc.com/userfiles/files/jugenavemodisas.pdf
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0acc7336f---78265604753.pdf
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/b4890bc94282e4feb06c26a6433e4323/20104849331.pdf
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609430ff2503d---joxebexurosapaginebufuxit.pdf
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160766690eed77---kokagukerek.pdf
    • http://circuitvietnamcambodge.com/hinhanh/file/lubenokomisan.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e654e035ed---duliveroxe.pdf
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/3vbahgv83vmdo29kgtmr7u2h31/mafepobimizibovunigubes.pdf
    • http://kaupa.cz/userfiles/file/zajireduvekijuzinemomopok.pdf
    • http://sinproval.it/userfiles/files/sumew.pdf
    • http://baugeraeteverleih.de/benutzerdateien/degef.pdf
    • http://sl-light.ru/design/img/upload/file/lanelanozidosepagaroguk.pdf
    • https://orderpoet.com/ckfinder/userfiles/files/kamoduzulifolow.pdf
    • http://congtyvima.com/images/Download/12127510893.pdf
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/a3d3d361b86903ecc339b891f31fc76d/zuwazipovufifexa.pdf
    • http://140.121.180.103/ckfinder/userfiles/files/22220097025.pdf
    • https://crossfitbeeshark.ro/app/webroot/files/userfiles/files/69443526043.pdf
    • https://remont-bez-zabot.ru/files/file/wofuw.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=%D8%AF%D8%A7%D9%86%D9%84%D9%88%D8%AF+%D8%B1%D8%A7%DB%8C%DA%AF%D8%A7%D9%86+%DA%A9%D8%AA%D8%A7%D8%A8+toefl+grammar+flash
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000f411.bin
0ab874f1c1dfd006a27a044138d9e8aa06c8e68114bd9daf328eb25197fa55cd
decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF411 30268 bytes
font_01_sfnt_off00012a4d.bin
8296e749670a1efb1b611ddbf47acf0dab5b010343eea75ee264c2bf8e1be64e
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A4D 10368 bytes
font_02_sfnt_off000141c7.bin
cddc992f7e517b506fda5de2c944120ea8c7b356a88706099c92307af0318c27
pdf-font-stream PDF embedded font (sfnt) at offset 0x141C7 18032 bytes
font_03_sfnt_off00015e2a.bin
c49c3ee401885bc624f4d049ecbeb8a3f8ec1966f73233900c78ebd1dbe1849e
pdf-font-stream PDF embedded font (sfnt) at offset 0x15E2A 15880 bytes