Malicious PDF — malware analysis report

Static analysis result for SHA-256 8baf0b98062a6e9a…

MALICIOUS

PDF

95.9 KB Created: 2021-03-31 18:21:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 08753ddeff12fd566d16528c9a08fa7b SHA-1: 87412bd292e721941331c7d29c4ac1ad65cd0835 SHA-256: 8baf0b98062a6e9a0c451e083a109c22f94b9ae4fdf4cdf7dc564094117bcfb9
214 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://yafferge.ru/award?keyword=anemias+carenciales+pdf+2020 In PDF document text
    • https://gulikefesagigal.weebly.com/uploads/1/3/5/3/135303577/3dba236fe.pdfIn PDF document text
    • http://medesutaduj.22web.org/30732608190.pdfIn PDF document text
    • http://my-credit.info/zazisumusumejofe2ci.pdfIn PDF document text
    • http://mgacessoria.online/92050262002td6xq.pdfIn PDF document text
    • http://xrootunited.com/tijejofx9xxo.pdfIn PDF document text
    • http://neojust.ru/jozimibooxre.pdfIn PDF document text
    • https://kajipeluvo.weebly.com/uploads/1/3/4/3/134318391/7792981.pdfIn PDF document text
    • https://pewarefat.weebly.com/uploads/1/3/4/3/134361746/405f7a7b.pdfIn PDF document text
    • https://xaxuxogupovugid.weebly.com/uploads/1/3/0/8/130874119/nijone.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/gatazeromij/43782952479.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/iowa_mandatory_reporter_training_aea.pdfIn PDF document text
    • https://063758de-fb2f-4258-809e-b727485bfd5a.filesusr.com/ugd/89cda4_66891c7ad9214de0a9e4158767d76b0c.pdf?index=trueIn PDF document text
    • http://xirujak.epizy.com/perkawinan_beda_agama_di_indonesia.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/28689626027.pdfIn PDF document text
    • https://cf62593c-3f62-494e-9ef9-3c2a63ead7d7.filesusr.com/ugd/93dae2_6db162f53760402c8183cb15a9ace479.pdf?index=trueIn PDF document text
    • https://0ea1ff7f-05b3-43a2-9744-178351a05ed1.filesusr.com/ugd/01f9b9_15f63b5606874a3dba32dc3ce628963a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mukutud/dewal.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/ranger_gloom_stalker_5e_guide.pdfIn PDF document text
    • https://6632aaff-1fe9-4f1d-acb3-7d444e457837.filesusr.com/ugd/ce4b7c_bff4a58f2a6d4417a942c7525e5f89c4.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012b22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B22 5160 bytes
SHA-256: fe2110058ca91823ad2dc5916bf46ae06bb57a21afb4bef9e4634d80adc08f66
font_01_sfnt_off00013c7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C7B 12064 bytes
SHA-256: 1d9232b89c022ac3a87b67463eb7a5b7ac2089b6afae8b885396ce1661a7cb10
font_02_sfnt_off00016412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16412 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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