Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaa9bd18f9aaf256…

MALICIOUS

PDF

79.6 KB Created: 2021-09-01 08:01:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 40cf1db7369324381227d830b32f3fb5 SHA-1: 61db08cfb49ddd7f7e06f0f3a5fad4e2f1312ca5 SHA-256: eaa9bd18f9aaf2566d903c6167affa25c600173ca37ebfe5c6824b82e81a471a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting. While no scripts were explicitly extracted, the nature of the link farm suggests an intent to redirect users to malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://cructi.ru/uplcv?utm_term=castaway+the+sims PDF link annotation
    • https://fl-forever.com/upfiles/editor/files/ganabikujukubikoturajo.pdfIn PDF document text
    • http://xn--rssx31a7tec6p.com/upload/userfiles/files/20210728055131.pdfIn PDF document text
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/cc4eb9egnuo9pkab3pjemrhgev/60881640273.pdfIn PDF document text
    • https://www.la-melodie-des-saveurs.fr/ckfinder/userfiles/files/dugudexuni.pdfIn PDF document text
    • http://freetourscadiz.com//ckfinder/userfiles/files/34059825364.pdfIn PDF document text
    • https://mehreganimaging.com/images/upload/files/zatofuzofabagamot.pdfIn PDF document text
    • http://asbazainville.org/userfiles/file/25341172520.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610e82ba0559b---42556249956.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/h93opii0709d7c3rh2tfb252qq/72869764800.pdfIn PDF document text
    • http://eastmoorclassof1970.com/clients/4/43/4343e427eb1b0a0668350338a4d6b623/File/turikeku.pdfIn PDF document text
    • http://win-sonic.com/kida2018/ck_imgs/files/53597238110.pdfIn PDF document text
    • https://mps-india.com/userfiles/files/56618666864.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/guxemafe.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d00366b098b---97385278168.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609760ccf14b4---xuvefunazujikunux.pdfIn PDF document text
    • http://prime-standard.com/piceditor/file/vogaxigumo.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/a67a9f7a7d1891752648a850e3f305cd/78621791852.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16090eeeba5472---96368132277.pdfIn PDF document text
    • http://hublihorse.com/uploads/userfiles/files/vanexuto.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160a4607cbe9c3---23287584135.pdfIn PDF document text
    • http://uro-medical.pl/zdjecia/fotki/file/16625241337.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/71430476855.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/df95dc9ea2078e684072893bc5663c21/xedajukodebosuda.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/1b70c5d7c9adce742496ad47fd9a4ea4/681279809.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_off0000d381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD381 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB93 17980 bytes
SHA-256: d0df39a02ad794fd33e87a28ad0ca91244a6d82c1681367fbac02a55dbae77f1
font_02_sfnt_off000119af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119AF 10236 bytes
SHA-256: 272b7f0440b242054453fcb65fb51ba6b44b1e18dfd3c64d1927973c923485dd

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