Malicious PDF — malware analysis report

Static analysis result for SHA-256 d14701160d1b4824…

MALICIOUS

PDF

83.9 KB Created: 2021-09-21 01:52:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d9315d2cbce492f55fa88cde0bd64797 SHA-1: d0ae2f51eb2651cf6805c954503d765982093fc0 SHA-256: d14701160d1b48242003710ba02cb87fce6c717a0468bb1868a9730b4e093ef7
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The presence of numerous external URIs, many pointing to disposable hosting and configured as a link farm, strongly suggests a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://philabc.ru/uplcv?utm_term=how+to+change+message+tone+on+s20 PDF link annotation
    • http://tech-in.info/bramy/userfiles/file/pebadulosi.pdfIn PDF document text
    • http://vedepcuaem.com/luutru/files/19040809755.pdfIn PDF document text
    • http://bftt.marketsearching.com/upload/files/25226728638.pdfIn PDF document text
    • https://behbehaniprojects.com/uploads/files/jekojipagexukepakoru.pdfIn PDF document text
    • http://pegastelco.com/pictures/files/tolet.pdfIn PDF document text
    • http://koszyczarek.pl/userfiles/file/54131527102.pdfIn PDF document text
    • http://kqcme.yiaiwang.com.cn/upload/files/boremu.pdfIn PDF document text
    • http://leprofit.ee/cmsfile/contentfiles/lowezomadiset.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/42147077974.pdfIn PDF document text
    • http://eakqshop.com/ckfinder/images_store/files/nasadotiwepiwenoriti.pdfIn PDF document text
    • http://daotaonhaccong.com/uploads/userfiles/file/1644328372.pdfIn PDF document text
    • http://jorkurojus.com/userfiles/file/xebibuf.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16141e13ec17dc---77959899293.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/161382efca392b---kuvugagagoxezugisififik.pdfIn PDF document text
    • http://meetburgerusa.com/uploads/files/30509590880.pdfIn PDF document text
    • http://kawana.tech/userfiles/file/worifogixe.pdfIn PDF document text
    • https://www.prshots.com/ckfinder/userfiles/files/vejufunuralapoluli.pdfIn PDF document text
    • https://alsharqcc.com/userfiles/files/82942890735.pdfIn PDF document text
    • https://www.highettmetal.com.au/application/third_party/ckfinder/userfiles/files/43692234390.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/65133528184.pdfIn PDF document text
    • http://snabsz.ru/ckfinder/userfiles/files/wodesabalesulexiteje.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/kufidegizej.pdfIn PDF document text
    • http://nage-z.com/ckfinder/userfiles/files/soluju.pdfIn PDF document text
    • https://mycocoa.org/images/upload/files/nasowijibolof.pdfIn PDF document text
    • https://ht-cooling-j3t.com/contents/files/38673518718.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/ruguz.pdfIn PDF document text
    • https://pima-alarms.net/slicice/file/lotev.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_off0000e04c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF863 10760 bytes
SHA-256: 8f1a8ff165a988c9f83d28f5a560539fd667031886b54e4651228a8c8b1a0ce6
font_02_sfnt_off00011110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11110 18412 bytes
SHA-256: ce3754d51112c9ec7cd8713779d1b1eb9fcfe248c87c8ba8b986f6829da0868b