Malicious PDF — malware analysis report

Static analysis result for SHA-256 09a986c0f5b8950e…

MALICIOUS

PDF

90.4 KB Created: 2020-11-09 17:42:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 794a397da66d2c3045801105e83300e8 SHA-1: 37adc5e9fb843696e0a7df81158033edae215241 SHA-256: 09a986c0f5b8950efbf9f81b8d0a80710e5ef340affa36c740320c0f26b9bafe
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to eyeglasses and application metadata, suggesting a lure for a phishing or malware download campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://cctraff.ru/123?keyword=zannie+eyeglasses+for+women In PDF document text
    • https://vumuzasal.weebly.com/uploads/1/3/4/5/134586685/770795.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367308/normal_5f98ddf5b9e27.pdfIn PDF document text
    • https://fisalusul.weebly.com/uploads/1/3/4/3/134341538/9347957.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
    • https://s3.amazonaws.com/wikurixobelu/right_time_of_the_night_song.pdfIn PDF document text
    • https://s3.amazonaws.com/temuxow/27430538950.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/rawuvizope.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/resejubibibegaxesotefonaw.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/bdo_leveling_1-60_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/business_environment_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/texifaxepag/kufizo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f330326-8469-40be-926d-89339d889b80/5684520547.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/grade_4_lukas.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/34691873110.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011c43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C43 4948 bytes
SHA-256: 7a292bb8fc8e23b3c4ceceac83674b6700c4a6789999715e01e02838c4228ac9
font_01_sfnt_off00012d0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D0B 9964 bytes
SHA-256: ac0d0943f4acd2f19309aa003d43ae234c7f4c69a53b20998590bf76b5c8c0b8
font_02_sfnt_off00014eea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EEA 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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