Malicious PDF — malware analysis report

Static analysis result for SHA-256 b02ede7fe31d5f7e…

MALICIOUS

PDF

91.9 KB Created: 2021-08-13 20:35:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 61707aa8f2742eda9dbb29103d1adbf2 SHA-1: e8204ed1cf834c23c2252d816a7840cddf89e6a0 SHA-256: b02ede7fe31d5f7ee9cd46f653755c8c09a900f1beefc12685a5c07f7353444d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites and a deceptive call-to-action button, suggesting it is part of a phishing or malware distribution scheme. The presence of embedded URLs and the nature of the heuristics point towards an attempt to trick users into downloading a payload or visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://smidgel.ru/uplcv?utm_term=how+to+hack+marvel+contest+of+champions PDF link annotation
    • http://www.truca-taoules.com//ckfinder/userfiles/files/32023961673.pdfIn PDF document text
    • https://chp-travel.ir/data/file/19268669260.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609f71ba9fed0---tisuniwam.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607777dce7f0e---poninakamomife.pdfIn PDF document text
    • http://bjallstar.com/upload/file/zepukimutipageforurame.pdfIn PDF document text
    • http://appletechsolutions.com/userfiles/file/sexudununujut.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c0c54737c4d---kuxorada.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba9aa120f0---76487923528.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160789e6ac55e8---ketuposikevon.pdfIn PDF document text
    • https://nslogisticservice.com/userfiles/files/tupufigipenuvozuniwes.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/tefozodoxegidujeto.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-6-21/20210621141706349419.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160910e8268956---3443530581.pdfIn PDF document text
    • http://trlgpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/63843852519.pdfIn PDF document text
    • http://lmalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/ganobit.pdfIn PDF document text
    • https://marblobath.com/app/webroot/img/files/palinixisovekoxiparupame.pdfIn PDF document text
    • http://abimobiliare.pl/pliki/File/fuxawebozadakevelezizigej.pdfIn PDF document text
    • http://stagnesreunion.com/clients/e/ed/ed16748122b3ff8ec97113314e0446c4/File/zoxosabiwe.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/44620b21d5edc6ef482c26e79a47b891/fadizosiganumino.pdfIn PDF document text
    • https://palezieux.com/ckfinder/userfiles/files/84947938590.pdfIn PDF document text
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/42278984734.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/515cc3e391b2db3591f0e2cb844c2323/sivusafan.pdfIn PDF document text
    • http://bscartridge.com/pic/xuret.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/7rfnpc2sc6b7ku60b8gtl1hbu7/40592539618.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d724985fa41---galipeminawelenul.pdfIn PDF document text
    • http://hoinhikhoavn.com/img/files/29291545723.pdfIn PDF document text
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/176a29cba8b24014cd8a2a2d3e4b519b/95480227146.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_off00010246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10246 17544 bytes
SHA-256: 6a7fce5ab225dc4467bcceb5d54bc8bdf1fcae9b59d0d067a109183c2dd6817d
font_01_sfnt_off00013020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13020 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14837 10980 bytes
SHA-256: 72f592ff969174c101c6c4b01deb051fd8088e9dd1395d7acaafd4eec1bd166f