Malicious PDF — malware analysis report

Static analysis result for SHA-256 14a97526cc77a516…

MALICIOUS

PDF

73.4 KB Created: 2020-12-15 01:13:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 7546ea3877eacc2a8bfd99b25335585a SHA-1: ed60d11fef086f38d9c119171de80d6979e55685 SHA-256: 14a97526cc77a5167b61d472a9b7e9ada008f8d1ce36b3623f0025357882602c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF containing numerous external links, identified as a potential link farm. The ML classifier and ClamAV detection strongly indicate maliciousness, specifically flagging it as phishing or a trojan. The embedded URLs, such as 'https://traffnew.ru/123?utm_term=software+engineer+cover+letter+no+experience', suggest a lure to a malicious site, likely for credential harvesting or further payload delivery.

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffnew.ru/123?utm_term=software+engineer+cover+letter+no+experience PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4422373/normal_5fb53bec86252.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383704/normal_5f9b8cae4eaf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385413/normal_5fd6331e17f2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418587/normal_5fa19bb9957c8.pdfIn PDF document text
    • https://zerexiborugixa.weebly.com/uploads/1/3/4/7/134705556/doludewij.pdfIn PDF document text
    • https://wopeduvolevim.weebly.com/uploads/1/3/0/7/130776212/xalutos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365540/normal_5f86f9528c647.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376612/normal_5fa0d14a78168.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://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe377d645712565405854d/1606301565378/99579819146.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc50480ec917750a3f21de4/t/5fce394af94b6402b245dad4/1607350603056/forward_my_calls_on_iphone_verizon.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1bcf424b06a7eb3051a73/t/5fc980ec55485c3109a75c89/1607041260430/griswold_christmas_ornaments.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3a28aaffbf90a66fb884b/t/5fc565b0f81c9a2a0c58c606/1606772145643/is_it_worth_it_let_me_work_it_gif.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc119b992c50b1a1e78b725/t/5fc7a667a907d7439ce1eb10/1606919783683/mineworire.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

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_off0000d38c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD38C 5116 bytes
SHA-256: 948883854ce5612d10d7c0740b49b5b78ddcbd6d690879bf564733643e043467
font_01_sfnt_off0000e511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE511 11164 bytes
SHA-256: a5f1faa23d34c1a48fd9c9cde366e88fba607b4ddd715ce352a532e492b139b5
font_02_sfnt_off00010aaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AAA 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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