Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcaedd8aecbd43a5…

MALICIOUS

PDF

81.0 KB Created: 2021-09-06 16:23:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 15f841b2bb99579fe95f1204f86ad423 SHA-1: 667fc69d2acee09ce9ed1e884ddb419c4a8d3eda SHA-256: dcaedd8aecbd43a50cb5e749adfa3e6844c7f1ed1a9d0a3fe571db0ff6f3252d
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. The presence of numerous links on disposable hosting further supports a malicious intent, likely to distribute further malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://lhs60to70.com/clients/3/32/32806278e47d7e4d905c37b1d6ebf04a/File/25085343928.pdf In PDF document text
    • http://yao-cheng.com/uploadfiles/20210901020513.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/ql7h1dvevu1ign521i8mp6dn52/26954992095.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a19a90a060c---89888076906.pdfIn PDF document text
    • http://client.diffuse.info/files/84731953147.pdfIn PDF document text
    • http://giaexploring.it/userfiles/files/84284974741.pdfIn PDF document text
    • https://taucaotoccatba.vn/images/news/files/15555760888.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/dbb6791bd9e78027964afc6630e799b3/90955214177.pdfIn PDF document text
    • http://bougerpourstarlight.org/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/56514828924.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ba1aa7c068e---jifudejafupevo.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160ee08d226f17---86026330145.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/18160785225.pdfIn PDF document text
    • https://zaragozadenoche.es/upload/files/16803583778.pdfIn PDF document text
    • https://birudongker.com/contents//files/88624078794.pdfIn PDF document text
    • https://datawire.gr/files/files/62700427890.pdfIn PDF document text
    • https://marljivo.hr/userfiles/file/5265762578.pdfIn PDF document text
    • http://domusanna.it/userfiles/files/sojutepuwusifefisazono.pdfIn PDF document text
    • https://mauspro.net/upload/files/tekapifi.pdfIn PDF document text
    • http://chronocertif.com/userfiles/file/dozewep.pdfIn PDF document text
    • https://italvaping.com/file/46705776959.pdfIn PDF document text
    • http://jfe.hk/userfiles/nifasululebibuzo.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/3369609759.pdfIn PDF document text
    • http://ouhkpthaa.org/userfiles/rofarimute.pdfIn PDF document text
    • https://boyanbolyarski.com/userfiles/file/damitifakuliro.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/e63176f791d30fc55c3a0c316cab8dc7/puzilezitifisonumozuvinon.pdfIn PDF document text
    • http://4grd.com/cmsimages/file/tazasanezenagutogo.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/a7fd698d2f76818cc5f8dd79cabacf92/wamujezimelagatosope.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=digital+multimeter+block+diagram+and+working+pdfPDF 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_off0000d531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD531 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED43 17996 bytes
SHA-256: bca041ae42a5a5f301ccdb4e7b3f622a38c3c2bb99b21b0695c4adcf229281f8
font_02_sfnt_off00011c14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C14 11212 bytes
SHA-256: 5f65816dbfc19b267ce0e6e88879b2429fc9cda506fac103286440980df3a022

Open this report in the interactive analyzer, or submit your own file for analysis.