Malicious PDF — malware analysis report

Static analysis result for SHA-256 17b208a9f6b78ac0…

MALICIOUS

PDF

68.3 KB Created: 2021-09-05 07:30:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ded1a8f54900b9311196b9627b635662 SHA-1: 2206520ebc2e3e69ad480bbc505e787e7ab46f5d SHA-256: 17b208a9f6b78ac04ae8685de6f3b45fb408f20c4bf395572c79431643c7b431
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. The heuristics indicate it's an image-only document designed to trick users into clicking embedded links, which are part of a link farm hosted on compromised CMS uploads. While no scripts were directly extracted, the presence of numerous unknown URLs suggests a potential for downloading further malicious content or redirecting to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 2 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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/f0f44b7a9f3b7f54fcfba78f158f966b/naxuzodazebomebulokes.pdf In PDF document text
    • http://www.ufolep-69.com/contenus/files/sotozufuv.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076fb8a19b59---45552883134.pdfIn PDF document text
    • http://auchli-appenzeller.ch/userfiles/files/50711663558.pdfIn PDF document text
    • http://shophouse.info/images/files/26613166269.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/7f465ad478af07674cb04167e0ecb818/63622405864.pdfIn PDF document text
    • http://apexhealthnutrition.com/newerac2c/userfiles/file/45099896870.pdfIn PDF document text
    • http://charugarware.com/DEVELOPMENT/charu_garware/uploaded/userfiles/file/37374861831.pdfIn PDF document text
    • http://rauvuonsach.net/images/uploads/files/3213108831.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16083c7cd01165---15783032218.pdfIn PDF document text
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/ss5rpiaot8bh893pud3rti8asr/bodemafosafusepuxojeb.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/91620367179.pdfIn PDF document text
    • http://akekaluck.com/ckfinder/userfiles/files/bufezujiji.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0a55e17ae---pawesarukugijor.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4a80c5c48f---76457008530.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/olcodfcuo4a174nl1s1a3h53uq/banukekawerevoselujid.pdfIn PDF document text
    • http://bradleyhillsapartments.com/demo/uploads/contents/file/lukojozizaduzuvikadubes.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a661cd2cf---28590510538.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608954a1cf197---loromuxelejeganu.pdfIn PDF document text
    • http://ngocvietbungalow.com/upload/files/zaruwifanigagu.pdfIn PDF document text
    • http://qunjl.com/userfiles/files/72085764205.pdfIn PDF document text
    • https://andana.us/files/files/8915129279.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=toyota+corolla+ascent+2006+owners+manualPDF 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_off0000aeb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEB6 14304 bytes
SHA-256: 70071fdcbb564f25a108b1c9cd18afb54bac01011bb04f82a474c6db65afe5c2
font_01_sfnt_off0000d21b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD21B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ea32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA32 10972 bytes
SHA-256: acea32296da4fc2b247511726e814fa04ebd95e9efbf3495f992d82628f39256