Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7785a3b46018038…

MALICIOUS

PDF

121.2 KB Created: 2021-08-03 16:57:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0bcf2f1fd2a60363a8281d5945e607b5 SHA-1: 417fc56d2ffb4c52efd166fa0d2e65b6f025b9cf SHA-256: b7785a3b46018038e66063e0fa1e4713fa3846bdf1669b389aaa86ceb0621f57
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting a phishing or malware distribution lure. While no scripts were directly extracted, the presence of embedded URLs and the overall structure point towards a phishing attack aiming to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://reniuved.it/file/dopexonetirurinafubab.pdf In PDF document text
    • https://alakharia.com/public_html/userfiles/file/65658703633.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080df7d4a408---29478513263.pdfIn PDF document text
    • http://beiwendq.com//data/attachment/file/dedifegel.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105e6c390919---53447349018.pdfIn PDF document text
    • http://imssp.by/data/images/fxeditor/file/nimofuxofo.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4365581af---69821847189.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/6fo05fofi3p2eqnpufa8jpn4sf/zizazapukeg.pdfIn PDF document text
    • http://annandale1963.com/clients/69704/File/89938924268.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adaf1b954e5---tolalevizeget.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/wixada.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8fdbb183b---kizag.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfc124177f---dumajo.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083cd8e26702---74763580903.pdfIn PDF document text
    • http://erdivigado.hu/userkepek/file/vagisubomojivefuzur.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/2m8mh0l5imh581n3qg374b07ba/kozepamidogobo.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607da9ff12027---82100141341.pdfIn PDF document text
    • http://auksozvynas.lt/userfiles/file/40100443265.pdfIn PDF document text
    • http://brenna-ski.pl/userfiles/file/bububuwokosigumogono.pdfIn PDF document text
    • https://majubesar.info/contents//files/gedipunez.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/jawamewofozibirasunapise.pdfIn PDF document text
    • https://migger.dk/userimages/file/falas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=approximation+questions+for+bank+po+pdf+downloadPDF 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_off00017039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17039 11308 bytes
SHA-256: 806a2c8a69086e37005c0401d848d55bc1bd7d62e4d8a2fdb816a581fbd13b3a
font_01_sfnt_off00018a76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A76 21640 bytes
SHA-256: fc8db566b898c43f77badfbcd521dcc6cc422434fb722d8a1869a86771636795
font_02_sfnt_off0001beb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BEB1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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