Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa16205fb91bc959…

MALICIOUS

PDF

79.4 KB Created: 2020-11-24 02:39:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 6ef048492278a34328bcc4ad94e587c0 SHA-1: 9852d4251c8f23be2a96eda45b3acc0215c90783 SHA-256: aa16205fb91bc9592b3002fa8747bf84e9a3b7e14dc7243c6c6c3329522e5d0d
214 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including a redirector link and a link farm. The embedded URL points to known malicious infrastructure, suggesting a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious.

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://ggtraff.ru/123?utm_term=led+by+the+spirit In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393508/normal_5f94943738607.pdfIn PDF document text
    • https://vasedowazapen.weebly.com/uploads/1/3/4/3/134320052/c23d07200b6bc.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/f5c5f59f-0521-49e1-bdad-96b5357e1859/34971057717.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/requisition_form_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66a43c97-13ea-4e45-a0da-9e93713553a3/feninajo.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/fazise.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/64092806688.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/agni_natchathiram_bgm_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbbfe1b6-9ca4-4eee-b269-6f1912e697fa/stomp_brothers_johnson_wiki.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/wabutaremetaxas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b131dcda-9dff-4476-81d0-094079b22492/66353847319.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_off0000fc18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC18 4988 bytes
SHA-256: d5370eb5c1db2e11c5392e4f7817b34843c0804597f7b3bf68ee916eb558f8bf
font_01_sfnt_off00010d0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D0B 10940 bytes
SHA-256: 3d9ddf0c5b83f9e1e220a3f70ddc7532735ff827ebb54b4e49993eb6d60ec754

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