Malicious PDF — malware analysis report

Static analysis result for SHA-256 170966cfe7ad01c0…

MALICIOUS

PDF

75.4 KB Created: 2021-02-24 02:39:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d7f2050937b3840e8a90e391bcc8a618 SHA-1: 06832e43f46b20899dbc9948957b89100e6b1e78 SHA-256: 170966cfe7ad01c09f85480f3b3381264fc7c9bd3cebf8007d52a59a20263b97
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic and ClamAV detection. The document body, though heavily obfuscated, suggests a lure related to Bluetooth device connection, likely to trick users into clicking the malicious link. The ML classifier also strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • 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.
  • 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://yafferge.ru/123?utm_term=how+to+connect+jbl+flip+2+to+laptop+via+bluetooth In PDF document text
    • https://static.s123-cdn-static.com/uploads/4465128/normal_5fc6bb9475109.pdfIn PDF document text
    • http://reznitskygallery.com/936221193551sm9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476122/normal_5fe7924ce580e.pdfIn PDF document text
    • http://fsfsfd.xyz/revujitmq69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409619/normal_6031611ac9751.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381320/normal_5fdbe385946e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426260/normal_5fc8ba877fb33.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415300/normal_600216fe1ce20.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470553/normal_5fffcdbf56029.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413226/normal_6023f27856e1d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374521/normal_5fe4046b54323.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426822/normal_6032b7fd56c0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453734/normal_6035985441a81.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389604/normal_5ff1f0dbf32bd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462075/normal_5fc9cf4405c98.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403539/normal_5fcaeb276f124.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383451/normal_5fc639ffcd16e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492915/normal_60006ee567da3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487623/normal_6027384c49718.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457586/normal_5ffe97f6d5441.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449187/normal_6009909e7a96a.pdfIn PDF document text
    • http://clobuss.ru/life_fitness_x5_elliptical_troubleshootingcuzst.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6E 3080 bytes
SHA-256: 3b6c3edccbbdf68622c80e44ac099bd4bffa00507f4f1bc839f0bdbf087aa810
font_01_sfnt_off0000e878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE878 5288 bytes
SHA-256: 2616ddc3222aee44837da8cb02a33d43c9deb77cc8576a04e45d00fcef4b1aca
font_02_sfnt_off0000fa94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA94 10688 bytes
SHA-256: d99cb7f33e162d508623ab6bfdd128a8246e004cf6021733ba610e469ffb1c2c

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