Malicious PDF — malware analysis report

Static analysis result for SHA-256 0561d019c6a4beb2…

MALICIOUS

PDF

86.4 KB Created: 2021-08-06 20:43:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6cd48ea0e8f2ff7e082e3aafad8948af SHA-1: faffb2b4f6de99ddfb289a31471d0590d96a0732 SHA-256: 0561d019c6a4beb256e388b8d74eac1c9bb94e688bfbf9743d9e3f9d65978132
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, containing numerous URLs that point to various websites, including those hosted on compromised WordPress installations. The primary purpose appears to be directing users to potentially malicious content through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 6

  • 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.
  • 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://hiddenforrest.net/clients/76790/File/63071502779.pdf In PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a00b20223a5---95738838659.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7e546d681---bafaleluna.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608443c775d58---dekuzimoligavinexib.pdfIn PDF document text
    • http://tsg-edinstvo.ru/userfiles/file/59844463887.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/316efaf9b0b471ffc43f9cc4b9d38c61/55763805840.pdfIn PDF document text
    • http://demenagements-remond.fr/userfiles/file/20210804063539.pdfIn PDF document text
    • http://xn----ctbguteehkho5h.xn--p1ai/ckfinder/userfiles/files/gamibatikuvobobuz.pdfIn PDF document text
    • https://eminenceconstruction.ca/viking1/uploads/files/96429720567.pdfIn PDF document text
    • http://bizbecho.com/pa/trainstation/uploads/image/file/bomobivosizukevewimewari.pdfIn PDF document text
    • http://hf1968.com/clients/48820/File/lajugig.pdfIn PDF document text
    • http://kaithompson.com/userfiles/file/xevojiwa.pdfIn PDF document text
    • http://szintai.hu/ckfinder/userfiles/files/64245348237.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/o40eb2batnr1c0vjhte9oackn1/700197254.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/gg9gpai710265ea3b0js99au2h/kijudigok.pdfIn PDF document text
    • https://0a3exp.com/upfiles/editor/files/98441686779.pdfIn PDF document text
    • https://medius.sk/userfiles/file/vagofipiwil.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/l34palreriiek34fj03nldrd67/jawoxunekokusabofibewuzuv.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/no8qb8st4f0g3lhs39k10r7j50/89679762525.pdfIn PDF document text
    • http://agro-pasz.pl/ckfinder/userfiles/files/15087645581.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b33b37f00e2---49904286097.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///32292181081.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/1ee77971891b29af87851bd78eb8abf8/89855776900.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=personal+swot+analysis+examples+for+studentsPDF 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_off0000eeb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000106cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106CF 11064 bytes
SHA-256: 0d5afd76475f89285d711d71429528fdd90ef9cd39fb91f5ffead52091150c9d
font_02_sfnt_off000120a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A5 16560 bytes
SHA-256: 3285e9ffa67ba47b19031272992c5fd6ab8974015210e1101aac947bb61c9c7b

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