Malicious PDF — malware analysis report

Static analysis result for SHA-256 69e7e9e7b445f4f3…

MALICIOUS

PDF

71.6 KB Created: 2021-03-17 20:35:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 3f15d6a533dddf1cc16bd34c410d3347 SHA-1: a4d349a82376d7335df14a0c1488594b904b3b85 SHA-256: 69e7e9e7b445f4f367ecfebc9e815460113bdfb794dad7fd9ead240a37bca5ba
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable hosting, and at least one known malicious redirector. This indicates a link farm designed to drive traffic to potentially malicious sites. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=my+arabic+alphabet+book+pdf In PDF document text
    • http://dezuforupom.iblogger.org/video_compressor_for_android_phone.pdfIn PDF document text
    • https://cdn.sqhk.co/zolulesar/c0jjLhj/57733796945.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376619/normal_603b13ddc9f03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408343/normal_604f85205fb94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389576/normal_5fe66fed203c6.pdfIn PDF document text
    • https://cdn.sqhk.co/keliziniw/74UpjeG/47622945333.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413373/normal_6011d4f272969.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://584dc5e1-4449-4bca-b3d9-d0e1fa08a972.filesusr.com/ugd/185caa_f1d010d776a04edda474af7ddf3b9b74.pdf?index=trueIn PDF document text
    • http://mowumurukilada.rf.gd/lonerwolf_shadow_work_journal.pdfIn PDF document text
    • https://6346cca1-8be9-442e-91e0-e35201572fa6.filesusr.com/ugd/a8c077_064d5cba68e64980a3c16a7451f83dba.pdf?index=trueIn PDF document text
    • http://kedekivotizera.epizy.com/how_to_tell_if_someone_is_a_secret_shopper.pdfIn PDF document text
    • http://gezofavuxova.epizy.com/jigitexonijemudabozoj.pdfIn PDF document text
    • https://7c3a386c-9197-44ff-a2a0-26a6be1b6260.filesusr.com/ugd/bba797_1b3a411fddee4dc882c15c63547097dc.pdf?index=trueIn PDF document text
    • http://fogidifi.epizy.com/wutodamidomelox.pdfIn PDF document text
    • https://87b84290-c0b3-4c73-97a1-3d59c64c3f69.filesusr.com/ugd/c638b7_776a10b7ff724dadb86b3bc0f00ec8f5.pdf?index=trueIn PDF document text
    • https://e72deea9-3c4d-48de-8429-d2e8e2d5d9b3.filesusr.com/ugd/68b2df_80c3972e47af406382c0b3d1673ce577.pdf?index=trueIn PDF document text
    • https://57ead060-d7b3-4f59-a803-6c9b47c0028a.filesusr.com/ugd/f30481_7b42c9e0f0d04f44b4e6aa8733572bcc.pdf?index=trueIn PDF document text
    • http://wujawejibizub.epizy.com/81221441340.pdfIn PDF document text
    • https://d25e5d79-f3dc-43ab-8538-58f2f4730235.filesusr.com/ugd/898300_49b9d601ced64dd6aa01c8a9d1a608d2.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F5 5376 bytes
SHA-256: c3e6d93e70bd851680b755b0513193db6ade387620c7e642d15444b36b2211eb
font_01_sfnt_off0000eb4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4A 10996 bytes
SHA-256: 360ebe0e4e84fa70a02b609144bcbdc0675bc48bf9e607fb71a22cbb71129677