Malicious PDF — malware analysis report

Static analysis result for SHA-256 47d6b223ddd791df…

MALICIOUS

PDF

73.1 KB Created: 2021-02-22 06:16:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 11e09f501df682c7a5321b4bd6727526 SHA-1: cf86d38684a8d26bda71c74a7bffc2ebd9c1751b SHA-256: 47d6b223ddd791df8dbfe3fb795c24fe4f04152a2108b4d6586cb95351d6e532
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with critical heuristics identifying it as a redirector and a link farm. The primary URLs point to domains associated with malicious activity, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text related to 'universal audio drivers mac', aligning with the lure of providing software downloads to entice users to click malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://crophysi.ru/aws?utm_term=universal+audio+drivers+mac In PDF document text
    • http://6gusevshop.space/custom_roms_for_android_tvayvk5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499622/normal_6017871585714.pdfIn PDF document text
    • http://lnstagram-copyright-confirms.com/home_design_caribbean_life_game_mod_apk_download5fzby.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422137/normal_5ff1911aded12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378167/normal_600ccfe1583be.pdfIn PDF document text
    • https://nisudine.weebly.com/uploads/1/3/1/4/131454656/jiketixupolipavid.pdfIn PDF document text
    • http://strapslap.online/dazokiluzuxukazikesisithcz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478134/normal_5ffc01ff2a3e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389604/normal_602d009b994d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463543/normal_5fc87a25c18e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481064/normal_602f565e773a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459628/normal_60216c376d899.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/45232029059.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/feferirenogal.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/12557605804.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/jatikesakox.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_off0000e162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE162 5136 bytes
SHA-256: b489cfdd5fd28f6f0b8b8f3657b157deaffbc30c2985a72fb718fc716af74b41
font_01_sfnt_off0000f2cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CF 10900 bytes
SHA-256: c687042a0202a9d37597f5906cf87c3a471e7b00d7b46d23d8a0ea163c725fa8

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