Malicious PDF — malware analysis report

Static analysis result for SHA-256 fac75c64b6c5503e…

MALICIOUS

PDF

65.2 KB Created: 2020-12-16 23:48:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 2f8aef76300385628201d3977525ff13 SHA-1: 8afbf992601c5bcf6f390a54bf54cc927650dc6c SHA-256: fac75c64b6c5503e3b45edb256c2f20f75cf32c664d94c31f18fca0380a8edb7
222 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the presence of embedded URLs and a 'download button' heuristic suggests the document's primary purpose is to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffine.ru/aws?utm_term=bypass+apk+for+samsung In PDF document text
    • https://ferowadamo.weebly.com/uploads/1/3/4/5/134593689/gurujevidodo.pdfIn PDF document text
    • https://xemupawiked.weebly.com/uploads/1/3/4/3/134321325/zukurat_lekovutepip_fipemajezep.pdfIn PDF document text
    • https://zosagejezigim.weebly.com/uploads/1/3/4/7/134709887/1d1f5d1256a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378386/normal_5fa132195618b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1436b12b-ee00-4f89-94fe-c46b3780e9da/cast_of_snl_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/telugu_dubbed_tamil_movies_2018_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/055fa1bf-2c86-4954-9e03-afc39cf7048d/sr_kitab_indir.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/vosixisufomepa.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/cantorales_catolicos.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/certificate_of_conformity_doc.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7912954d69c5962363680/t/5fc9b71a9c93c058c4828253/1607055131258/grass_cutting_shoes_with_spikes.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC242 5404 bytes
SHA-256: 423292b499f340ba634572f558c2e74f6fb54c8c41607fb80e9de809c9e89b81
font_01_sfnt_off0000d4a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A3 11212 bytes
SHA-256: 3144736fabdf19acea4988836a0380ed7249d73a8db163789ecf4fd37e2e7a58

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