Malicious PDF — malware analysis report

Static analysis result for SHA-256 7532d4cffa785ad3…

MALICIOUS

PDF

162.3 KB Created: 2021-06-09 19:52:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: dc80d76e1383dd550c2134b01b1e352a SHA-1: 8b8c95d06f68f6dd89576b122d7d6dca56d500c9 SHA-256: 7532d4cffa785ad3a7de1ddca82a495ac9052002a639b559b07c0f3b9407c4f4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains text related to a download lure. The embedded URL `https://chcial.ru/pbw?utm_term=crisis+on+infinite+earths+download+full` is the primary indicator of a phishing or malware distribution attempt, likely serving as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9814

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://chcial.ru/pbw?utm_term=crisis+on+infinite+earths+download+full PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416495/normal_602882fcf4229.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458148/normal_603077bd67a33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457592/normal_60417638a70fa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446030/normal_5fffb0cfe583c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492529/normal_5fcd654a67ce0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418188/normal_601ef6e736d5e.pdfIn PDF document text
    • https://bajusumuke.weebly.com/uploads/1/3/2/7/132741128/futixivigagi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480744/normal_601de7269a076.pdfIn PDF document text
    • https://sovurides.weebly.com/uploads/1/3/5/3/135349611/vafagimenesolimeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381108/normal_60698e73a5bda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420025/normal_6024aa2fd6e47.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fawugomem.pbworks.com/f/what_is_diazonium_salt.pdfIn PDF document text
    • http://mizelabe.pbworks.com/w/file/fetch/144908016/luka_chuppi_movie_all_song_mp3_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec3fae0e-f94d-44ee-a7b8-319981883a75/mechanical_engineering_internships_austin_texas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9bc6b04-630e-4bd5-a3b0-a50686c0ccd4/how_to_add_dstv_now_app_to_hisense_smart_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/171952c5-9fea-41f4-81b0-5a325babed53/narnia_prince_caspian_book_summary.pdfIn PDF document text
    • http://viluxese.pbworks.com/w/file/fetch/144413265/75249121843.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6018b5bb-e74a-43c6-b4b8-f577ee605e4b/pexudozidafizavexeg.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000227c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x227C9 4992 bytes
SHA-256: 7bd3958290bb1aea07e9fec69fc868e3602771f815f887d80f91727a7285c2d4
font_01_sfnt_off000238ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x238CE 12400 bytes
SHA-256: ce514ba056becd10108589b4e3a268a850f633b835c0372bf4d645f4a8f79e7f
font_02_sfnt_off00026276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26276 16344 bytes
SHA-256: ed45a24507f18daeaf6b6e9cac20235e9e43bed88bc2d44b7621eff085e31190
font_03_sfnt_off000277ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x277EE 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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