Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b018bb6b1bbcc02…

MALICIOUS

PDF

84.6 KB Created: 2021-08-24 19:06:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 87f9234e53ac2d3019dd8f1a752081cd SHA-1: 46ef97bdf4ff176b214a8b400a7e343abb6d178e SHA-256: 1b018bb6b1bbcc02e730909852072d6ee38a2456785f13bcc80b62db992af715
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external URIs and link farm heuristics, indicating its primary purpose is to redirect users to potentially malicious websites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the structure and URL patterns are consistent with a malicious PDF designed to lure users to compromised or disposable hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://inwebjor.ru/uplcv?utm_term=miss+jean+southern+cuisine PDF link annotation
    • http://lumieretvie.com/userfiles/file/wanazi.pdfIn PDF document text
    • http://livestocktool.com/d/files/17669529669.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/121f40007309edd07bcc60f48a218ad0/devirisolu.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/kadvnhc5kv3mhqkl70k5cc4845/7235860300.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/958875f94b2a72bbc817184e2e1059c6/38040054430.pdfIn PDF document text
    • http://nbkhjc.com/uploads/202107/file/2107251028025440010z9s65xvz726.pdfIn PDF document text
    • http://fizjoactiv.eu/Upload/file/wuwuxejutoxazagodolikaj.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/66953801125.pdfIn PDF document text
    • http://hotararicedo.ro/files/files/fafaxenamavejasumunedason.pdfIn PDF document text
    • https://chupwo.com/editor_upload/file/kejikovukuradog.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c982ab15b8---kotenivokageboveru.pdfIn PDF document text
    • http://webatnet.de/ckfinder/userfiles/files/fuzijujinitibufobijonozo.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1c4b953a37---9179174031.pdfIn PDF document text
    • http://equipociclistaugeraga.com/ciclistas/userfiles/file/bofinazu.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/44c3794172a9584c6411a1521cb30048/53445800969.pdfIn PDF document text
    • https://rinducm1.com/contents//files/40575411908.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/v6jkrl3rpjutmmi1es7coprmpt/lenudituvixoweko.pdfIn PDF document text
    • https://hogozaty.com/ckfinder/userfiles/files/mexugixawimupigifonov.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/ldo2vgk0b62qggjbmrpfg48343/kapuxozokuxawu.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/f89dd159e63ad332784a1a931b122dd7/72624947356.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d794b821db3---42629529676.pdfIn PDF document text
    • http://shukokai-voves.fr/userfiles/file/kelipa.pdfIn PDF document text
    • https://eclearusa.com/images/file/wilajinukodiwuxapumojeba.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_off0000e7d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D4 17352 bytes
SHA-256: 71841ebd7a415a5b688d2c53d07eff15fe1f3d2af7055c52c3500c42f5b0b4a7
font_01_sfnt_off00011556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11556 10504 bytes
SHA-256: ae087f2ed2f8faf597b16c3d0b5ec87342d470aaf48291118654c572f7f27d6d
font_02_sfnt_off00012d30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D30 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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