Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddc9ed287e9b480a…

MALICIOUS

PDF

74.8 KB Created: 2021-09-07 00:13:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7d0737a241896ab7c01f286e8fac76c4 SHA-1: 289afb58b995b4484f084ade9e66c63e3cb5ad79 SHA-256: ddc9ed287e9b480ab971cbacd0c491e6af31d21708400c2e12a197142e12fcc0
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to websites hosted on compromised Content Management Systems (CMS) or disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8438

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 https://alakharia.com/public_html/userfiles/file/29956244405.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/ndkspmr55oq9po7439o1mq4po2/91826190328.pdf
    • http://diagnosticaedilizia.com/userfiles/files/5932175812.pdf
    • https://skatrip.com/basefile/skatripcom/files/muvamemofo.pdf
    • http://nutricion-intravenosa.com/wp-content/plugins/super-forms/uploads/php/files/1f2d18a45f15d2a4546cdaed306a986f/mevabura.pdf
    • https://ddshower.com/ckfinder/userfiles/files/61639563005.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd98d18d83---fajudosepom.pdf
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/f5a286d88b642721791af14f0bee701a/20025271391.pdf
    • http://magicdiscoradio.hu/userfiles/file/14159446927.pdf
    • http://asiadomainstore.com/userfiles/file/pibigugawum.pdf
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/futis.pdf
    • https://akproauto.com/nbloom/fckuploads/file/77891816697.pdf
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160746da77c7ed---13296320570.pdf
    • https://speakingparrot.com/upload/ckfinder/files/67044090391.pdf
    • https://www.poolsrus.com.au/application/third_party/ckfinder/userfiles/files/mazediburinevo.pdf
    • https://mkycc4.com/kycc4.com/userfiles/files/lesuwogefodimezaf.pdf
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/912c10b95f7d745e2bb71f25e50e1774/guvofibesu.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160737656b775c---togelukoxulux.pdf
    • http://aaaexpressheating.com/userfiles/file/togizatizazawer.pdf
    • http://www.clc-engineering.com/siteuploads/editorimg/file/57022587060.pdf
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7fa38c773---risuluvuzafojureto.pdf
    • http://razaviota.ir/basefile/razaviotair/files/20337155226.pdf
    • http://akademibt.com/resimler/files/wobirobupesukijasig.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=pulgadas+a+mm+pdf
    • 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_off0000cafa.bin
efc3fd37602ce781db8d3ce4bd77e76db0a13f5f762296179631f13569f9f823
pdf-font-stream PDF embedded font (sfnt) at offset 0xCAFA 16952 bytes
font_01_sfnt_off0000f6be.bin
045aa92917453422e9d050259ed13c5526a4bee00794e7d86700a0e7e0e27672
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BE 10296 bytes
font_02_sfnt_off00010db7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB7 16792 bytes