Malicious PDF — malware analysis report

Static analysis result for SHA-256 028a6772d450f1b5…

MALICIOUS

PDF

67.8 KB Created: 2021-10-01 06:06:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 41876d3ab71bf856ea5a377c734caf47 SHA-1: f48d7e54bf056e4e1521839a280847bef4ffe354 SHA-256: 028a6772d450f1b562be06419bf4efbe5ec46b2bfbf196faaac4f1f54b292f09
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF exhibits characteristics of a phishing lure, including being image-heavy with minimal text and containing numerous external links, many of which point to disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent. The document likely aims to trick users into clicking a link that leads to a malicious site or download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 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.
  • 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://almar-bus.pl/userfiles/file/45720008925.pdf In PDF document text
    • https://promtour-rural.ro/userfiles/file/lojujupipugufasixivuwezib.pdfIn PDF document text
    • https://esterkins.de/ckfinder/userfiles/files/72246983539.pdfIn PDF document text
    • http://stylekd.ru/files/5800958358.pdfIn PDF document text
    • http://cdn.eagle.mn/uploads/userfiles/files/kukubotudisun.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/41739101803.pdfIn PDF document text
    • http://staractivecollection.com/resimler/site/files/jokaxomeg.pdfIn PDF document text
    • http://lex.tj/img/file/mowoxuzaburitokujut.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1614e71b56b027---wigolapedawakesaganeg.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/sepuvob.pdfIn PDF document text
    • https://anakmeong.com/contents/files/21942550708.pdfIn PDF document text
    • http://bastola.org/userfiles/file/rizafokipizikaxitejutazol.pdfIn PDF document text
    • http://aktifbant.com/resimler/files/47528357180.pdfIn PDF document text
    • http://archbot.pl/files/file/78319430553.pdfIn PDF document text
    • http://zl369.net/userfiles/file/49006180907.pdfIn PDF document text
    • http://mt-filtration.com/uploaded/file/1915913021613bf72fb233d.pdfIn PDF document text
    • https://rhuyscampingcar.fr/images/files/barikisutoturawenowaxilil.pdfIn PDF document text
    • http://saikunghouse.hk/userfiles/romupasaladevorosar.pdfIn PDF document text
    • https://naves.cz/res/file/78458348812.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16149176758064---wetusofite.pdfIn PDF document text
    • http://we2meeting.com/ckfinder/userfiles/publics/files/33741746635.pdfIn PDF document text
    • http://nagyberki.hu/sites/default/files/fck_uploads/file/biberapopepafo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=how+to+check+ram+used+in+android+phonePDF 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_off0000ac5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC5A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC471 11000 bytes
SHA-256: f18874324b338820e6a926536d2f7138a4c2600ce358f694534cfb4267d8d0b8
font_02_sfnt_off0000ddda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDA 14292 bytes
SHA-256: f9bb22b5f649e1490460aafb5d429ef72679350b08d9e4c6137a4ee14710cf1f

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