Malicious PDF — malware analysis report

Static analysis result for SHA-256 94f59161d2b1dcc6…

MALICIOUS

PDF

86.3 KB Created: 2021-07-02 17:41:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e79a74f63c4bc9839ad220ec8626ce5c SHA-1: 84e95046779dfde05f4945bfad48328635903c1d SHA-256: 94f59161d2b1dcc6a6351a353f780e605f0d075c5bb8add3228899c96ca02c1d
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution scheme. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • 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://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/4a71e5786d8ace808cade06f5c9b2747/rutixupaxivavitabi.pdf
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2132f4388c---90373582263.pdf
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160a3fab71a83f---31295109423.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/3ldj93s6hpl098bbbe0jicdjdm/52926181739.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/v1niup0bmi8i4nugljarqtjf3g/67427046693.pdf
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/160da5a929a614---49138202125.pdf
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609cfabfb447e---42131735903.pdf
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160753a6857e81---nolonuzupikofuvebapi.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc928e3b27---94176316678.pdf
    • https://poolpoint.be/uploads/file/noroxigadowepore.pdf
    • http://infoegrafica.com/userfiles/files/risitifisofedigalelev.pdf
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee30971166---94555670428.pdf
    • http://ledson.ru/upload_picture/70804725306.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608d79f02f392---40604502734.pdf
    • http://t-eamplus.de/web/editor/files/53804361313.pdf
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/devp3r4a77lq86ti7oikou4142/zarijemobafol.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/ab92d0514dc0541b5c603bca5e7d4895/dovibuzuluruwizul.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd7283838d---lagofezasasisovuga.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a0635352ac8---vipadoniguvomunogopitanej.pdf
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/41290f44cce85e1dac58773bac8cbf36/kilojotujadifikinipuda.pdf
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd1ef1d86b---27039850275.pdf
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/d884c3f9c83859a63d1e9ae54ce800d3/31965829253.pdf
    • https://mvpartners.be/images/uploadedimages/file/kigonotopo.pdf
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/bfe6d3366c5258dc2bb067a76915f16e/8995752792.pdf
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a988df8b13b---95154574824.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=slow+cooker+tomato+risotto
    • 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_off0000ee81.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE81 16792 bytes
font_01_sfnt_off00010693.bin
3c2ec1a4dc9140ec77b8883eb27fde297354d5260626e2017505fa202332a6fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10693 17260 bytes
font_02_sfnt_off0001337b.bin
84c020b86cfc43a8aabbef53653c27662ed3765faa1bd4930fe2f8435d4d80a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1337B 10540 bytes

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