Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6e19c2f57aef15d…

MALICIOUS

PDF

88.2 KB Created: 2021-07-21 04:28:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7695f1759e0086d82d6a99a7ec3807f1 SHA-1: 4654f803799bb486e67231e00a7a3283c1615f2c SHA-256: c6e19c2f57aef15d01e8331bbd560ab56b86d76cdaa83ef37e2de97fe4d30259
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The file contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting it functions as a link farm to distribute phishing content or further malware. No scripts were extracted, but the presence of external links and the overall detection profile strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://icmasistemas.com/userfiles/files/4457348306.pdf In PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0a096245e---14111141368.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/472e2m1fl2uqv5t426o3020mid/47700081549.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/k77neclkqi8c3c633jc9o9t9eh/lozetuziforekopibisudotod.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4d614592f---54987569356.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082dd7aac596---76149617091.pdfIn PDF document text
    • https://chp-travel.ir/data/file/roletafovukolu.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/q4u2m4dlakt8dna7n2eqq58hq1/bukifapuwo.pdfIn PDF document text
    • http://mitsubishilongbien.vn/images/ckeditor/files/89820993720.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/1m937qputo467gotemqd7utphm/nobivupubixiwugigomulawog.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/mvj3oocl4sisc93rup50pf6a17/7597143232.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/53104978374.pdfIn PDF document text
    • http://evansmedia.ca/userfiles/file/wowuxexanazalijojotenebig.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088f0fed4004---jaxufa.pdfIn PDF document text
    • https://angkaganjil.com/contents//files/617359782.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/22354387160cd31332cf12.pdfIn PDF document text
    • http://coimbra.hu/uploads/ckfinder/userfiles/files/20309691500.pdfIn PDF document text
    • http://makinsushi.com/uploads/files/jozasufevobapejedekup.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/vedenog.pdfIn PDF document text
    • http://bendhorseride.com/userfiles/file/23925526016.pdfIn PDF document text
    • http://sequirk.ie/userfiles/file/kekonudofavatederoduzipux.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/u97bvjeukv10q9ivql25ajoc24/jadozagofegot.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160c0fb0430a21---saxasadu.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608473d2c0ef9---73950908269.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/55932313957.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/09ehd0gd8um3o6l2tlqb2mptmn/redimupalewuvadamotafosof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=what+guys+like+in+girlsPDF link annotation
    • 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_off0000f822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF822 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11034 16608 bytes
SHA-256: b7404aad7d050bd9ff1b0c7db53438a13a4f0f56c7118bd2bb292ce7b19d31b5
font_02_sfnt_off00013b71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B71 10568 bytes
SHA-256: f5f3f3bd45d1a993cb53c5da60937eb6925534b090bf84109cc4e8337012d25e

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