Malicious PDF — malware analysis report

Static analysis result for SHA-256 aefe173b22696552…

MALICIOUS

PDF

73.8 KB Created: 2021-09-17 11:50:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: cb39b228f545cc5e6662cf4bef78f11c SHA-1: 54f46b5558bb1e5efdeef82894f680ae10ced236 SHA-256: aefe173b22696552851498158dbb70d5c6893af365f830733f0ad20a616207ce
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, indicating a phishing or malware distribution attempt. ClamAV detection and ML classification strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://archism.ru/uplcv?utm_term=watch+jumanji+welcome+to+the+jungle+online+free+123 PDF link annotation
    • http://gabident.pl/local/userfiles/file/69006007903.pdfIn PDF document text
    • https://www.jnvhardoi.org/ckfinder/userfiles/files/fabazuzonudolovokoxivil.pdfIn PDF document text
    • http://elvirajogsi.hu/ckfinder/userfiles/files/kejeforanatasutokol.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161318c269d661---lumiguvazewem.pdfIn PDF document text
    • http://mopron.ru/upload/files/xofisawumawikow.pdfIn PDF document text
    • http://hotelbellevuepalermo.com/userfiles/files/lidurikuvijitorogetinojev.pdfIn PDF document text
    • http://italianopizzeria-pg.com/uploads/files/53310879789.pdfIn PDF document text
    • http://stellarp.com/userfiles/file/59588108245.pdfIn PDF document text
    • http://www.moyekolodin.com/files/tavepubojuxo.pdfIn PDF document text
    • http://urdu-hadith.com/survey/userfiles/files/63313056942.pdfIn PDF document text
    • https://www.hinkler.com.au/application/third_party/ckfinder/userfiles/files/senelimur.pdfIn PDF document text
    • http://imdad-egypt.com/userfiles/file/newivabu.pdfIn PDF document text
    • http://nawooelcs.com/upload/userfiles/2021/09/files/210913154637.pdfIn PDF document text
    • https://beldapin.com/calisma2/files/uploads/58941243343.pdfIn PDF document text
    • https://quatcongnghieput.com/uploads/files/sesijolowabozovolu.pdfIn PDF document text
    • http://kanoonkaraj.ir/dbmanager/filebank/htmlgallery/file///2814256953.pdfIn PDF document text
    • http://xn----0tbbbfo0f.xn--p1ai/userfiles/file/50007348928.pdfIn PDF document text
    • https://maconlux.ovh/userfiles/files/84138816215.pdfIn PDF document text
    • http://gocep.org/data/userfiles/files/nukikavuwivubamolikaw.pdfIn PDF document text
    • http://dakdekkersindex.nl/images/uploads/88443697684.pdfIn PDF document text
    • https://rwd1.thadv.com/upload/files/zametidiligeruwu.pdfIn PDF document text
    • http://eortak.com/img/fck_temp/file/72447586921.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_off0000bbcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBCC 16568 bytes
SHA-256: e8adf9fa4b38b7d83bf2a03a3de943fbd78fbf910a555f219495e711936a2c88
font_01_sfnt_off0000e6bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED6 11268 bytes
SHA-256: 45dc777635a078269548efe1394f64e0e2c8a28a1619efe723ca0db077631a6d

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