Malicious PDF — malware analysis report

Static analysis result for SHA-256 583470fcc2402953…

MALICIOUS

PDF

89.2 KB Created: 2021-06-26 08:02:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2d7873d405d691e1b060f7568c0aef9c SHA-1: 4b090c34030f22d884572f729dd1eb58b2a039a2 SHA-256: 583470fcc2402953b66744c33ef1a8cf84fd534d047009fb52668adc22d2e5c0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains a link farm pointing to multiple compromised WordPress sites, likely serving as a distribution point for malicious content. The presence of external URIs and link farms suggests an attempt to lure users to malicious destinations, potentially as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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
  • 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.
  • 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://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0d9e1c2f1---52018705522.pdf
    • https://calmoinc.com/upload/editor/file/fezejurewuneronarifotegon.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/16096b8917247f---lasiboduwovod.pdf
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160b26164e75b6---loxiponovomu.pdf
    • https://betenrealestate.com/sites/default/files/file/63067869738.pdf
    • http://anhbanglaw.com/userfiles/file/43272710388.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/1p1v1fucfa9b2nbn8li8l2fd96/kibusujobo.pdf
    • http://bioscipublisher.com/files/upfiles/file/80553925358.pdf
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/f69d660ca00a239d4a4cb53e71df5658/bulonanubawibegukazupa.pdf
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/a9629932c6ef5dc33db3067b40d716e9/55364559218.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607802c2a349d---92944627221.pdf
    • https://irantruck.ir/data/file/44394451407.pdf
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/v41fr1p7oki0shlgmbai9t4gbt/kepolenujigopelewozomiz.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/9deaec525145cb4245f54d9feacdf38d/96259700460.pdf
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/a06f0b5cdb36ecadb71c6e3e88272f4e/50451207277.pdf
    • http://chayka-svg.ru/files/koxasofawozi.pdf
    • http://kapelski.pl/userfiles/file/8852811447.pdf
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/0e87gm9nrig2orqvubkt7mn4tn/vawarakitozasefelivisusum.pdf
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608037a4557aa---25948944466.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/ef7178576870e08d21b47d780e03ad00/tuvemufefeduxobikavuf.pdf
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16091d9504073d---74716889842.pdf
    • http://biirbeh.mn/images/content/file/sekefebuxarutegijem.pdf
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/8fb68524136909577d2f65cc6607f1c4/83528019204.pdf
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/fdd947e6e5fde3a1185abffd9127de42/rizuge.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec09a7ba94---futepusizag.pdf
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160884db963e1d---banaraxodufiwakijatutula.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b47e6151690---98639146270.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=girlfriend+in+a+coma+song
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8bf.bin
2baaf5c519e23a27f51fef661d37b9c408db03742377f35061637d3df1a84a72
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BF 10760 bytes
font_01_sfnt_off0001113a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1113A 16792 bytes
font_02_sfnt_off0001294c.bin
9920e7fe95bba1f89b155ad516f7bacd1cec83f57eea0640624c855101dfd3b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x1294C 17728 bytes