Malicious PDF — malware analysis report

Static analysis result for SHA-256 59e67d8c11024c3a…

MALICIOUS

PDF

85.6 KB Created: 2021-09-04 15:43:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 866f1c134cb10ab1afa2c33bae8fda96 SHA-1: 5b958f319cff1464582bfddc31075316e5aee39e SHA-256: 59e67d8c11024c3a446e6ba82cd574d8cf0164dbd02b6e3cb5db5a2998e9c5bb
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. It functions as a link farm, with numerous embedded URLs pointing to various websites, some of which are hosted on compromised WordPress sites or disposable domains. The primary purpose appears to be directing users to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://queure.ru/uplcv?utm_term=parabolas+worksheet+pdf PDF link annotation
    • http://statsale.com/data/upload/ck/files/gifepo.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160881611b844d---pixeko.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/b3d091d67ccd0b7533e6a0b90c227fdd/12667149902.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094de036c00d---19316912136.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/dbcrbntst4ka7srs7m86u5pt00/sekaxaviberigojoge.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/ce861073f74f1f1a46b8e74cacd623e3/89192850601.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/3c543037667420e14e3deb973c33ad1b/raxuvopibaxopuzuxivo.pdfIn PDF document text
    • https://paroles-vives.com/ckfinder/userfiles/files/widimorasutone.pdfIn PDF document text
    • https://aedwea.com/upload/foto/54555986939.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161050f19370a3---70696228395.pdfIn PDF document text
    • https://loyallcanada.ca/editor_files/file/54393008629.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/6eonehsl43rl2jkbei3d26iss3/88110501243.pdfIn PDF document text
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/9501ecc6afa0b46a8b37a7b6b9ce2a3f/90555430937.pdfIn PDF document text
    • https://bataretak.com/img/files/file/lovapaxoju.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160782385a05e3---64052057599.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/nnv8tpps754h2v57mesrdobdee/62280771874.pdfIn PDF document text
    • http://club-integra.ru/userfiles/file/wuratokezilefavixowuse.pdfIn PDF document text
    • https://sapsda.org/SapmaUserfiles/file/83295646695.pdfIn PDF document text
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/58ehbptcocfq928epq4tos4jq4/77620413113.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/c0ab954c61deecc3721160edeb836394/lawofaso.pdfIn PDF document text
    • http://ekonopuntos.com/campannas/file/23854330641.pdfIn PDF document text
    • http://www.truca-taoules.com//ckfinder/userfiles/files/97219706023.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/92057913154.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E5 18660 bytes
SHA-256: a3c468882d7ed29f336ae969377102e1f5a85142e2c86ae0db0a327c7fd97bbc
font_01_sfnt_off00011879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11879 10716 bytes
SHA-256: b254848de878abf6341f6ca38af9ffe6287d60a269c3dc6cb2d7070b0c4d8b80
font_02_sfnt_off0001311e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1311E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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