Malicious PDF — malware analysis report

Static analysis result for SHA-256 fac44cb8cff2edb2…

MALICIOUS

PDF

67.3 KB Created: 2021-09-27 10:44:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: 0663b36be82896cc2417c1201d9eb964 SHA-1: 730d631cc6887ba1e90a9c49eb7b584339995046 SHA-256: fac44cb8cff2edb23693c5523bbbff27ce104d7a12dca204e574b9df9231807e
176 Risk Score

Malware Insights

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

This PDF document is designed as a screenshot lure, presenting an image to trick the user into interacting with a malicious link. The link farm points to compromised WordPress upload storage, indicating a distribution method for further malicious content. While no scripts were directly extracted, the PDF structure and heuristic firings strongly suggest it's part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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 67 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 http://onlytech-tunisie.com/userfiles/file/sugakak.pdf In PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/1613a77f736390---97595877695.pdfIn PDF document text
    • https://ceccarmehedinti.ro/userfiles/file/gukagefidadotepum.pdfIn PDF document text
    • http://sobinco.cz/ckfinder/userfiles/files/xidazewipolalani.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c00d60acaa---bekasuze.pdfIn PDF document text
    • https://surupaceanu.ro/ckfinder/userfiles/files/logakamafasapomuduwu.pdfIn PDF document text
    • http://www.rsvpcatering-ar.com/files/imagesfile/40209939334.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16130c3b647207---xakoxi.pdfIn PDF document text
    • http://joeun-it.com/userData/board/file/54058081725.pdfIn PDF document text
    • https://groupunsur1.com/contents/files/87519672881.pdfIn PDF document text
    • https://0922.sproname.com/files/userfiles/files/xenogodizojokoz.pdfIn PDF document text
    • http://design-klasse.de/ckfinder/userfiles/files/bevikogowoximekakorofen.pdfIn PDF document text
    • https://indiachristian.org/uploads/files/29991580565.pdfIn PDF document text
    • http://xn--4k0b43gkwo4gn.com/upload/editor/file/voxokomibiduwiwa.pdfIn PDF document text
    • http://centroolosprato.it/userfiles/files/xuzavurax.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/16147dd1921a11---gejaze.pdfIn PDF document text
    • http://aczelzalog.hu/tmp/zovojaluzemejobemiwotoxug.pdfIn PDF document text
    • http://worldsocialistpartyindia.org/ckfinder/userfiles/files/wefusuzuletejafi.pdfIn PDF document text
    • http://quetthe.com/upload/files/kapuvamuvofufokufevuta.pdfIn PDF document text
    • http://remont-m.com/userfiles/file/mirusakufawizidigevubetu.pdfIn PDF document text
    • https://www.agencesramos.com/ckfinder/userfiles/files/37858103467.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e6e4311f4e---89403317128.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=sultan+full+tamil+moviePDF 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_off0000ae4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE4A 10348 bytes
SHA-256: 59afa0a676b50f19f473ad2f194e40f202c7bba5bd7d9b9006d26647f5c3f6f7
font_01_sfnt_off0000c5b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ddc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC6 13836 bytes
SHA-256: b96ff3481b755d96f66b0747ad0520daf9152c48b82427919b4de8454cb60540