Malicious PDF — malware analysis report

Static analysis result for SHA-256 1701494fa12362cc…

MALICIOUS

PDF

47.5 KB Created: 2020-10-30 20:54:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 42ee01784a13cbb84e038b3378cd71ca SHA-1: d6ce8d365be4ec4c44c1b8e91a896ce4ac7930cf SHA-256: 1701494fa12362cc7f28516a7f74f4c9893bff6cf43d2bcc9b83fad103b4d170
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of embedded links, with a critical heuristic identifying it as a link farm pointing to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The presence of numerous links suggests an attempt to direct users to external, potentially harmful, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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/strik?keyword=coined+the+term+meaning In PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/7d3707d5d.pdfIn PDF document text
    • https://wunimebi.weebly.com/uploads/1/3/4/3/134361225/wimakusedefefi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368989/normal_5f912ea4c4181.pdfIn PDF document text
    • https://zozilevijuni.weebly.com/uploads/1/3/1/3/131383476/xamebarumada_satono.pdfIn PDF document text
    • https://fabuxitewuf.weebly.com/uploads/1/3/4/3/134349615/b8dbe.pdfIn PDF document text
    • https://bilimetib.weebly.com/uploads/1/3/4/4/134435282/tudojixalerone_varij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0185/0273/files/wireless_charger_samsung.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/dovazitiritufokugerefif.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/nejanelaxotegemokubazen.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/rf_power_amplifier_basics.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/zufunowariparuxage.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/google_logo_vector.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/vudosoroxumawomarowubo.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/zenith_motion_sensor_light_troubleshooting.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/daihatsu_sirion_parts_catalogue.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_off00007e39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E39 4932 bytes
SHA-256: cba49944b8b3f668b4951db53b838186348920c09a15362776e95ef9bf08dedd
font_01_sfnt_off00008ec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EC7 10044 bytes
SHA-256: 0c849cf4e8840f8608fdd86aecd174dbee3a13abe17550d8f98cc425ba4533a9

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