Malicious PDF — malware analysis report

Static analysis result for SHA-256 14e9cbebd8dcc75d…

MALICIOUS

PDF

86.3 KB Created: 2021-09-13 03:24:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9310c5f82027ea32b6822ac1c2cace73 SHA-1: 2e576709be8ca6fbb8cb7423117f7d9bef22572a SHA-256: 14e9cbebd8dcc75d418eafce6d2e70e711c744a08cde6b1164ab0d85ce5006e6
164 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to compromised WordPress upload storage or disposable hosting, indicating a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, specifically identified as a phishing trojan. No scripts were extracted, but the structure and URL findings are sufficient to assess the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/16139051e89726---xudifagexesemosuko.pdf In PDF document text
    • https://sanghvicranes.com/staging/media/vezebirez.pdfIn PDF document text
    • https://heart-calligraphy.com/uploads/files/202109050127327500.pdfIn PDF document text
    • https://ilonew.tasksplan.com/userfiles/files/97602935130.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134d8a77c77c---zobedube.pdfIn PDF document text
    • http://abdon.madteam.net/ckfinder/userfiles/files/fisuginovovako.pdfIn PDF document text
    • https://icoachyou.biz/images/ckeditor/files/risunetebojonewos.pdfIn PDF document text
    • http://pop-around.com/file_media/file_image/file/xasadebubev.pdfIn PDF document text
    • http://saringkarnwood.com/UserFiles/file/pufegosajunananirudateg.pdfIn PDF document text
    • http://antasboru.com/guvennet/resimlerfiles/92458969915.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/rorawopokizabuxeti.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/k4jr2n5f5j7jjsgde841qg8v8d/96562737726.pdfIn PDF document text
    • http://www.eurosecurimed.com/ckfinder/userfiles/files/39920182414.pdfIn PDF document text
    • http://balcimimarlik.com/resimler/files/buzoruleta.pdfIn PDF document text
    • http://trunglam.vn/uploads/userfiles/file/vifiveb.pdfIn PDF document text
    • http://aimic.com/userfiles/file/98809044541.pdfIn PDF document text
    • http://nemochem.cn/upload/files/55729152083.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1613335ed816e3---mowowonasapijexide.pdfIn PDF document text
    • https://cs-nippon-cp.com/mailmagazine/upload/files/38798771270.pdfIn PDF document text
    • http://ildongwire.com/userfiles/file/75645387950.pdfIn PDF document text
    • http://ambulanceservice.pl/userfiles/file/fudarewovidogisuvivejake.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613204bce669f---6160917827.pdfIn PDF document text
    • https://fix2go.info/userfiles/file/lopulawogufarukeximix.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161380149b7dd8---70163834194.pdfIn PDF document text
    • http://nordicwalkingturak.hu/_user/file/30056980204.pdfIn PDF document text
    • http://proclima-membranes.ru/userfiles/file/xezirilipulonewegariko.pdfIn PDF document text
    • http://vibrobreaker.com/files/files/rovibemuxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=mobile+legends+bang+bang+skin+claimPDF link annotation
    • 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_off0000e724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE724 19712 bytes
SHA-256: d06773a308c59a110a91f73925c585e6a25a337bc7e72a9d2a1109c884327feb
font_01_sfnt_off00011a8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A8A 10740 bytes
SHA-256: 1437b93cc2c1d5d49e8a9bf761077b7affc61fc7125b6e452abe2e7a34c5e03e
font_02_sfnt_off000132f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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