Malicious PDF — malware analysis report

Static analysis result for SHA-256 d20276b3de96bd74…

MALICIOUS

PDF

93.3 KB Created: 2021-07-31 19:48:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 23ba5104210ce4d2ec7bda6fa69facc9 SHA-1: cccab74f45ba049dd232c5fd6be05ae6200e8300 SHA-256: d20276b3de96bd74aebd5718141e6dcbe89206bf312e5b16df6eb42e4a1858c6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many of which point to compromised WordPress sites, indicating a link farm designed to distribute malicious content. ClamAV and ML classifiers strongly indicate maliciousness, specifically classifying it as a phishing trojan. The presence of multiple external URIs and link farms suggests an attempt to lure users to external resources, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160cb20bc60a76---xatidanopasuv.pdf In PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/a1e0466375a5b460c2041258d1c76817/nefimaguwiguge.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/93896710377.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/ziteforexipazakipubo.pdfIn PDF document text
    • https://dansobentre.net/uploads/file/ponowikazikixu.pdfIn PDF document text
    • http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/97848924289.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c90cd99fad---dizoxabojurovezeju.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a03d3908782---15883936461.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/kilugijufasawevavep.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160a8bb9ca36cd---zenavo.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/50bb0d1feeeedf3222828a781d72f997/wakijukifirixo.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/xixopuwize.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/cfa296f42b869ffe5c98eb54b7d586cc/74032437822.pdfIn PDF document text
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/jdpog2ktigjghfjv0mtj5het8h/57830396365.pdfIn PDF document text
    • https://rowadalbyt.com/userfiles/files/rusoxaderewipaxebijavesir.pdfIn PDF document text
    • https://yukkumpulgroup2.com/contents//files/suwagaw.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/c20a7b0baa3b22c273599b3f3d06be39/pigeret.pdfIn PDF document text
    • http://sunrui-ti.com/d/files/46777739395.pdfIn PDF document text
    • https://tenfci.org/userfiles/file/43789811660.pdfIn PDF document text
    • http://capitalclassof1970.com/clients/e/e7/e78cae7b17622b0161c193cbd63f4fd0/File/muduxerodamifudaladufoj.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16071ac69175b9---61796062626.pdfIn PDF document text
    • https://aedwea.com/upload/foto/11470698798.pdfIn PDF document text
    • http://spc1962reunion.com/clients/c/c5/c535eb5d361035e84cedf1152ec4da8f/File/70500541.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/6d25fb724cd5cbc63c57b0e4da8b58cb/digirezululotijo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=exercice+ce2+s+ou+ss+a+imprimerPDF 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_off000102ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AE 10592 bytes
SHA-256: db473278c4fe82efad35e8a0006f21e5e04ad6216cd468db8c2da2f3fabf66be
font_01_sfnt_off00011afb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AFB 20408 bytes
SHA-256: 7470b8b590e3201355b4918cbdf51d3c50d81f30e3775ea760d3db1527f941d7
font_02_sfnt_off00014cc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CC1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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