Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e4a0224dfa5c7c1…

MALICIOUS

PDF

95.4 KB Created: 2021-09-07 03:13:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ae4d3572691ee24e1ca5d01fe064d8d6 SHA-1: 2786bfac6dfdad159e5611efce97d3e78c3ebc17 SHA-256: 3e4a0224dfa5c7c16a8cb2a56560d61fd62754b0d6a5486f6edbd4e59c4fd4b8
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing lure, primarily through its extensive use of link farms pointing to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially malicious content, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/fn4vtfiqe11918nh1soijsduh3/5926358203.pdf In PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/52ac1cfa76964294b4035b87ebe4afd1/vubavikazalaxur.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a086945243a---59751153462.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/d76221a3a44a811bc2cc04a3d512e581/tujafifowizozenudan.pdfIn PDF document text
    • https://kindeeyudee.com/ck_files/files/wezoropixokivemunom.pdfIn PDF document text
    • https://carlojans.com/cms/file/20000179205.pdfIn PDF document text
    • http://ux-school.ru/files/files/59629046455.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/fbfb26ac91a29491497d84e29df28532/51187880044.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6905ebe04---rifuruxegavoweril.pdfIn PDF document text
    • https://adesso-moosburg.de/images/file/vobafaneketogog.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/31741162084.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/xavifuxegadipewotafot.pdfIn PDF document text
    • https://zzwgjx.com/d/files/togariradofo.pdfIn PDF document text
    • http://tunglamgarden.com/images/fck/file/lalanezufa.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610087af9b497---gevokobifidaw.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/i7cev1lbup2ahcq4fuorqts0be/toroto.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/wamaridavekize.pdfIn PDF document text
    • http://hitelesen.com/userfiles/file/fetagogirile.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f1fe00300b0---91988158406.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/71c02ab82512089644ef3c2ef18cd544/jedifokagijunuvoliro.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1609a30c838e18---wagenibusadukefotewexofes.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/mewatogefewa.pdfIn PDF document text
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/bv4j37jou2eliqthqmk71l8ia4/91688089291.pdfIn PDF document text
    • https://enkaotomatikkapi.com/depo/sayfaresim/file/kogudoxetewiw.pdfIn PDF document text
    • https://ofcourselc.com/admin/uploadsfile/45446014684.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=herencia+mendeliana+en+humanos+pdfPDF 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_off00010cc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000124de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124DE 10880 bytes
SHA-256: 9a8d5100ffef622399e80d201b601b1761a1d1d18e6727d8014abb1d96c31251
font_02_sfnt_off00013dac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DAC 19704 bytes
SHA-256: 6a5676354abdaf1130e0102d238fe948ae206078302ab4891ae35448a9c3fe6c

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