Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ecb06d64a9edb00…

MALICIOUS

PDF

66.4 KB Created: 2020-11-21 04:41:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 1bb319f445cd7f2fb1a96c7e531bba43 SHA-1: b3b61d15af474efde6d8966b38efa6041cbea92b SHA-256: 3ecb06d64a9edb005cc916390dca1cbae0ff0f5c1f11753d11ceb355d52d09e1
222 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link to known malicious redirector infrastructure, likely intended to lead the user to a phishing or malware distribution site. The document body, though heavily obfuscated, appears to be a lure related to technical instructions, combined with a call-to-action button heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffmen.ru/123?utm_term=how+to+fastboot+mode+oppo+a3s In PDF document text
    • https://kisebuketi.weebly.com/uploads/1/3/4/6/134657705/paresulo.pdfIn PDF document text
    • https://sowameneritela.weebly.com/uploads/1/3/0/7/130775755/tojimeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453129/normal_5faec5a7a73a8.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/8535066.pdfIn PDF document text
    • https://mavepokakep.weebly.com/uploads/1/3/4/6/134628520/77e787d7d08d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366366/normal_5f8b460b5d2ca.pdfIn PDF document text
    • https://nimubawelekuf.weebly.com/uploads/1/3/4/2/134265751/lufajagavo_pezeg_womowog_mofijot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405902/normal_5fa6257085065.pdfIn PDF document text
    • https://dubuzimonovox.weebly.com/uploads/1/3/4/3/134347386/3489135.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wonoti/jomudakigokukenubobixefir.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/luposavibisiwopotu.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/life_and_death_twilight_reimagined_vk.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/internal_conflict_between_romeo_and_juliet.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_off0000c602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC602 5416 bytes
SHA-256: 1bdae6c72465bde1ad860f2c9aac3e2784cbc34de5d9e6c9d1d734207e4f7105
font_01_sfnt_off0000d870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD870 10748 bytes
SHA-256: 9dd8e04d512d3cd8f23f14627b21b5176bc547f26cf12e931e44b0de47bec9eb

Open this report in the interactive analyzer, or submit your own file for analysis.