Malicious PDF — malware analysis report

Static analysis result for SHA-256 e584931ef9605c4d…

MALICIOUS

PDF

79.3 KB Created: 2021-09-04 11:58:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 52c6bd5e5d3e99dd056922f6742998aa SHA-1: 7538258909ddc5f7fbde43f831155ef49397a47c SHA-256: e584931ef9605c4d48370af88249ce783d4decee47bf5783517cc9f0c7fcbff9
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and links to compromised CMS uploads, indicating a link farm designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous URLs point towards a malicious document delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 https://chcial.ru/uplcv?utm_term=como+convertir+varios+planos+de+autocad+a+pdf PDF link annotation
    • http://commune-bourre.com/userfiles/file/nekubumajademiwogutoxoro.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/1907d4b86709c793cd29193ef98ea9af/rezosotalorom.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/94c70e501bcb79153b11aeb07929fb71/digukixaponutodaxumukef.pdfIn PDF document text
    • https://rpdev.org/ckfinder/userfiles/files/tafupapolufesuvavugufipe.pdfIn PDF document text
    • http://bi-acaovo.com/upload/files/radozokamofoxi.pdfIn PDF document text
    • http://kondicionery-fryazino.ru/upload_picture/file/96188275982.pdfIn PDF document text
    • https://whiteplacard.com/UserFiles/file/7521928990.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b55167a2435---jamigutogiwem.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16075e0c8300ad---suzenijawisok.pdfIn PDF document text
    • http://imaginove.eu/data/Files/letokugirijazonej.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084ba0e2cc89---43125654445.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/5cdekrdg5hg7ai09em91u0d115/bajeveninagodeseni.pdfIn PDF document text
    • http://asianaccounting.com/admin/fckeditor/userfiles/file/wakax.pdfIn PDF document text
    • http://ybshajiang.com/userfiles/file/2021-07-28/2107280831175623688la3ugzp6kgv.pdfIn PDF document text
    • http://nktrading.qa/file/files/12800469848.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/wokapa.pdfIn PDF document text
    • http://mousike.it/img_ins/files/jixibazesilewirazezobuxi.pdfIn PDF document text
    • https://kaxtongroup.com/home5/maxconne/public_html/kaxtongroup/assets/images/newspostimages/files/56601980642.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/257185420.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/j8j8r0ghaq6epofab7dbdg50be/fakamu.pdfIn PDF document text
    • http://natur-pet.cz/webpagebuilder/ckfinder/userfiles/files/44721919118.pdfIn PDF document text
    • http://chocoenglish.com/_UploadFile/Images/file/maniruroziwip.pdfIn PDF document text
    • http://geodeslaboratori.eu/userfiles/files/1953248599.pdfIn PDF document text
    • http://chlahb.com/uploadfile/2011/new2011617/files/2021/08/20210818143621.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e8d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D2 10976 bytes
SHA-256: b1576f7bdd3214b5ca4e9b194fc86419dc62c5a17015c8b453a20c45f8c0d20b
font_02_sfnt_off0001024e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024E 18096 bytes
SHA-256: c17b0f61d30d690e5f64966b6e6cd20e3c08c9a2ed8d1fe10d441f51c0f3a827

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