Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1616e777e0ad64c…

MALICIOUS

PDF

88.5 KB Created: 2021-06-28 00:52:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7ed3b6c474c878457126b2ea03cd3c07 SHA-1: 32d75156d0477a5b0073860ef253eaa09e2604f9 SHA-256: d1616e777e0ad64cbbc38e2682a473328b36316555dbed9f6080eedc9fb9fc05
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that point to other PDF files hosted on various websites, many of which appear to be compromised CMS uploads. The primary purpose seems to be directing users to potentially malicious content, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://callalilyvn.com/upload/files/38392653663.pdf
    • https://t2sc.me/userfiles/rosaniretubigaran.pdf
    • https://cuisinescartier.ca/upload/editor/file/82735858893.pdf
    • http://aivieksteslaivas.lv/userfiles/file/tetasemetumupidexef.pdf
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/930d2131860b5b76bd1f63a5258258e7/kobulaz.pdf
    • https://majorsagilekvaros.hu/uploads/file/soxak.pdf
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/2poamtkogfe4refvbe1r1ao115/59630913484.pdf
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/6369af4fa4c18f0102b8563b27e67aae/linod.pdf
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/8b7rclkl2snjuieq7t5hgls9d2/karajimoxerifol.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609272689bbc7---7498315765.pdf
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/br3g8ffjntup45h1slm91hp4kg/sejozit.pdf
    • https://morabia.fi/images/file/62045898101.pdf
    • https://susta.vn/userfiles/file/popazusuxoxirosozu.pdf
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/5837df3c99d019500d0dbb26adb1d942/vujajesukanusaxutobo.pdf
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/704571da441d734d81e2bc6c7d7acfaa/53255281028.pdf
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c05d740709---69602922653.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608756976a904---36544573132.pdf
    • http://senseoftourism.dk/userfiles/file/55277118611.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c152d57abb6---29299460038.pdf
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/b87e5387499ac45ce672eadd13e1a106/dokaxa.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d52ca1bb839---6121573510.pdf
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/8c7de219e0f241bc165796baaf0ce74a/jovewifefe.pdf
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076bd845cf35---wikomuriwoso.pdf
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/3e97ddd1e0f0cdbfe31885b67901afa5/xekizoxal.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=shortness+of+breath+after+talking
    • 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_off0000f6f6.bin
e898e13e844527e3b858d1a731d7d14786451da3e3e41da298402e5a378afdb8
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F6 17152 bytes
font_01_sfnt_off000123f2.bin
d2bef9149dbce7acac95775d21dbd95694a41073e4cbddfadd3635c07431b7a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x123F2 10800 bytes
font_02_sfnt_off00013cbf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13CBF 16792 bytes