Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c410cca596efcd5…

MALICIOUS

PDF

69.4 KB Created: 2021-09-30 23:38:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: b01632ca578ef0b763c85bde013a47df SHA-1: b99bec99f040d924db20fa23662092728724044d SHA-256: 7c410cca596efcd54cc0a2af72155a68063542d6fa1329842090b8b142b957ce
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file exhibits characteristics of a phishing lure, including a visual appearance that suggests a screenshot and numerous embedded links pointing to potentially compromised websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to direct users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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 0 text block(s), carries a click-outward action, and is only 69 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://chcial.ru/uplcv?utm_term=watch+soul+2020+online+putlocker PDF link annotation
    • http://silverspringabw.com/uploads/files/jovepizerijejopapapo.pdfIn PDF document text
    • http://paglialonga.it/userfiles/files/77748044320.pdfIn PDF document text
    • https://ontech.vn/images/ckeditor/files/42371648800.pdfIn PDF document text
    • http://yotlist.com/uniformkontakt/userfiles/image/files/12050592253.pdfIn PDF document text
    • http://citadelcaralarms.com/userfiles/file/paregagowa.pdfIn PDF document text
    • https://glamweddingdesign.com/userfiles/file/givegovug.pdfIn PDF document text
    • http://ksiclubcom.ksiclub.org/svnprojects/DHD/Source/images/files/76841071597.pdfIn PDF document text
    • http://nemalipics.com/49287564701.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c85d374901---82988640362.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16147f3fca62ca---dowodajafugupolerod.pdfIn PDF document text
    • http://www.poliklinika-hb.cz/userfiles/file/70314345742.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/38864484302.pdfIn PDF document text
    • http://www.eau-msu.ru/ckfinder/userfiles/files/24143662736.pdfIn PDF document text
    • http://simkoongschool.com/uploads/editer/files/15698594753.pdfIn PDF document text
    • https://braintreeclinics.com/app/webroot/img/files/15107895121.pdfIn PDF document text
    • https://vidaleve.net/ckfinder/userfiles/files/63302161733.pdfIn PDF document text
    • https://devcons.org/uploads/userfiles/files/sigilemibarariverefoku.pdfIn PDF document text
    • https://ljlconst.com/admin/images/file/fekelugu.pdfIn PDF document text
    • https://habibitours.org/ckfinder/userfiles/files/69288289492.pdfIn PDF document text
    • https://kristinanamaste.eu/files/netogama.pdfIn PDF document text
    • http://wixoon.hu/upload/file/53998846964.pdfIn PDF document text
    • http://aorganboys.handyfriendship.com/upload/files/87815972359.pdfIn PDF document text
    • https://cahayaapi1.com/contents/files/mevomafimi.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136150de5fd4---rumuluxota.pdfIn PDF document text
    • http://cukierniabrzezinski.pl/www/artizam/fck/file/rulejudutime.pdfIn PDF document text
    • https://latgalesamatnieki.lv/files/file/80213855133.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_off0000b0c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0C3 10896 bytes
SHA-256: c3a1c070a07302ee5c211e7ef194ca0d3f5d0e56444c276ea207d9724c1ecac0
font_01_sfnt_off0000ca06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE218 14484 bytes
SHA-256: 70bd5cae1cf0740a8aedd4f9781f79b86db40aeffef2582b4106053ff2a44521