Malicious PDF — malware analysis report

Static analysis result for SHA-256 6980545c09c898aa…

MALICIOUS

PDF

76.1 KB Created: 2021-06-26 03:29:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a57bef0236db461ef97ad4cc2f006c18 SHA-1: 7a4403b3ee60dcb7396da31c6d59075c5a1afd0e SHA-256: 6980545c09c898aa10c5d6782f04c074f1fe9ccb389b4d25aae821f0c8c7c0c6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified the PDF as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting it's designed to redirect users to potentially malicious sites. The presence of multiple external URIs and the nature of the link farm heuristic strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c187cd1a196---75799294054.pdf
    • http://multi-accueil.fr/ressource/site-image/files/deguwexajep.pdf
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/4fee49cf886bf3ad8855260b8f42edca/lakunezolurepusoziranif.pdf
    • https://sce.tw/uploads/files/60c09061c22b7.pdf
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/bc1ca9fea0aaa0380450802113db73b2/dejexab.pdf
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/b41cd40c2e4cbac46869737979721700/6570836169.pdf
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/410685c476cce2b1aca04b0c7233b6a1/fitobidojanaz.pdf
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff3c18424f---72493708705.pdf
    • http://fqcycpa.com/jingkelun/userfiles/files/20210612145251.pdf
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/f83a8c9948bc8f616ddeae5f7813e1f3/munebowesilogubiwo.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16075e98e1c609---gejazopewomiwajubuzuga.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607760eb7efb4---najaxabomuxezigupe.pdf
    • http://dentherapia.hu/files/file/90731539161.pdf
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c92bf92173---nisefo.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160858f22ddc50---wakivewozufoj.pdf
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/71791e4a510d29b9600e21a925852a6c/firegepawivugubodujigu.pdf
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/62ba5d2c78d15fd9c16fdf9f17dc7abd/91173657356.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16094c37adedcb---17316994075.pdf
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/4c256a574f5a47725d1c70d06fe413fa/daresosatilafusure.pdf
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/4ce7f57d3163fa42f89b525d14bfda7d/sibaresewosokijurulat.pdf
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607b529225d01---54415119360.pdf
    • http://timavoshipsupply.it/userfiles/file/zikepaxum.pdf
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/8433ba5569030b06b3f8c00b73812191/rezuzonodoviwapiwukuwuxim.pdf
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160b6a5a059017---77335765183.pdf
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/79bf7424ce834987b8a760e8712a8449/6578178988.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2a82bcca0---17058298795.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=geometry+assignment+1.1+answers
    • 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_off0000c4ae.bin
bd24d577fbbcd0bcc67ee683143fbd75b4ff1c4a3a5130c616f5d452321c2455
pdf-font-stream PDF embedded font (sfnt) at offset 0xC4AE 10760 bytes
font_01_sfnt_off0000dd98.bin
809a9700c0a21d7560c1a1dbdf6ad6da12160c9bc3d085c37dca2ba4ec190f17
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD98 17176 bytes
font_02_sfnt_off0001097f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1097F 16792 bytes