Malicious PDF — malware analysis report

Static analysis result for SHA-256 74d3dbe3f74d3f0c…

MALICIOUS

PDF

68.7 KB Created: 2021-09-30 17:53:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 5cb9b289271b4658d82af823417fc359 SHA-1: 95a36d5052cae0881e7f3729f01cab3e65e9af78 SHA-256: 74d3dbe3f74d3f0cf814a5030b06eee17fea573fc65db5c787e4209bf788eafe
146 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. The heuristic 'PDF_IMAGE_LURE' indicates it's an image-only document with a clickable action, designed to deceive users. The presence of numerous external URLs, including one pointing to 'pixomot.ru', suggests a redirection mechanism for delivering malicious content or phishing pages. No scripts were extracted, but the overall structure and URL distribution point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://pixomot.ru/uplcv?utm_term=star+wars+heroes+unlimited+crystals PDF link annotation
    • https://ristovski.mk/public_html/upload/userfiles/file/nodegumagebaravanojofidap.pdfIn PDF document text
    • http://bighost.vn/uploads/userfiles/file/ralenojewugikimifu.pdfIn PDF document text
    • http://albergocavour.com/userfiles/files/54093560659.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131059832563---gebokifiwiguvozagilutav.pdfIn PDF document text
    • https://easternresources.net/ckfinder/userfiles/files/22072071418.pdfIn PDF document text
    • http://abnig.friendship-match.com/upload/files/65187143251.pdfIn PDF document text
    • http://autosklo.sk/pictures/file/zefarenun.pdfIn PDF document text
    • http://club-integra.ru/userfiles/file/xezevaguxowakif.pdfIn PDF document text
    • https://www.domaine-vrignaud.com/ckfinder/userfiles/files/40167842637.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16134061c740f9---82502545199.pdfIn PDF document text
    • https://datxeninhbinh.com/data/dulieu/files/21570264777.pdfIn PDF document text
    • http://nemochem.cn/upload/files/44150754582.pdfIn PDF document text
    • http://szerecsengyogyszertar.hu/editor_up/45158285975.pdfIn PDF document text
    • http://preiswerte-unterkunft-papenburg.de/mediapool/19884947998.pdfIn PDF document text
    • http://www.mecateengenharia.com.br/ckfinder/userfiles/files/kalewomatefojojomukev.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/81933445560.pdfIn PDF document text
    • https://aodaixuan.vn/app/webroot/upload/image/files/lipesebivorolo.pdfIn PDF document text
    • http://saraiaser.nl/userfiles/file/65417649401.pdfIn PDF document text
    • http://solarexperten.ch/fckeditor/editor/images/file/wabulubegira.pdfIn PDF document text
    • https://arerp.kr/data/file///rusomukotudilirumevum.pdfIn PDF document text
    • http://vitalenzyme.com/uploads/fckupload/file/ziredokanasimobexi.pdfIn PDF document text
    • https://leciv.fr/uploads/FCK_files/file/23010119096.pdfIn PDF document text
    • https://pasarangroup2.com/contents/files/muwupipuworexu.pdfIn PDF document text
    • http://moveworldtogether.com/datas/files/besotanitodukizumadanoze.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000afb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFB7 14328 bytes
SHA-256: 85a51e4870bfbc143d9baa0abf17674bf0ae868cf8807171ffc263a9ae7a06a7
font_01_sfnt_off0000d3df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ebf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF6 11008 bytes
SHA-256: fb3483dcf58ecff8696cd0b7b102d3fb17aae52cb8493a8d23ad5e985d113b43