Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc322a3614fbcfd3…

MALICIOUS

PDF

88.6 KB Created: 2021-09-04 04:05:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 04f983db9017381fdf337a9bd846894d SHA-1: 025bc82c85b8fb8a67bb24f6270e158ed6a453ff SHA-256: bc322a3614fbcfd3339b19b5d64af176436473dc9e11df0f53c5028254c9c5ea
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm hosted on potentially compromised or disposable domains, suggesting its purpose is to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and link farm nature are indicative of a phishing or malware distribution lure, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096fd519be84---47539493030.pdf In PDF document text
    • http://firegallery.ru/img/upload/4345935131.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/4554d4da2656392c8d14f6cbf7d75199/69751555616.pdfIn PDF document text
    • https://cmfnepal.org/userfiles/files/64641841160.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/964ae4c911bc34a2f4f692bfe6a3345a/3443427626.pdfIn PDF document text
    • http://wu-pao.com/upfiles/editor/files/sijeguwifotulawutax.pdfIn PDF document text
    • http://geometramaurotozzi.it/userfiles/files/25629051400.pdfIn PDF document text
    • http://kozszemle.hu/uploads/files/jagawax.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/cinl4bc522p6jg6sjdsasd0cc4/36186564027.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fe94e36dfb9---81639323453.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071130fb5d72---fisorojulamejozivem.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/466b7d7548797d02b63619ef5a69a43f/43794756887.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/c893d27e84f38cd5434b334fa4f61257/vugoma.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/74440851484.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/vezevagevawa.pdfIn PDF document text
    • https://jeanmarcrobion.fr/userfiles/file/xelesivezepomeregobagufam.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/37996496624.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/60e02fd7f13060dfe408a10aa45bfe5a/31170351897.pdfIn PDF document text
    • https://pianotuningdarwin.com/userfiles/files/migeligusezizaduxaja.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774cd9b1a40---velazizekasaluri.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160825c668afe0---juxideguxisi.pdfIn PDF document text
    • https://schmitz.cz/res/file/25154591758.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/e89210a2b821a68038fc012de25ab124/fexodoxibilumosax.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/3607732cd546c06a39617045e4a28004/xewedugowitazulolidepof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=basics+of+nanotechnology+pdf+downloadPDF 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_off0000f36e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36E 18568 bytes
SHA-256: 3ee55e8facfa5e46f160184b90578600c2306db39cb441f6eac6125a6e24af0a
font_01_sfnt_off00012419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12419 11052 bytes
SHA-256: 74e021e5819c8528bf0fef3c0ff848b1ed7021bb8821cf0e485177f7db23c7c3
font_02_sfnt_off00013daf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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