Malicious PDF — malware analysis report

Static analysis result for SHA-256 6180dae791b41e8f…

MALICIOUS

PDF

76.7 KB Created: 2021-03-24 12:37:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5cc45ea4a1e1091c0dab13a83ee96d7a SHA-1: 5a75833a503017d0fd33c67537859e511cae75ea SHA-256: 6180dae791b41e8f7d1eb2e707f0f2fd68378c7cbbde4d8aee7320d708da7984
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/strik?utm_term=what+are+the+music+channels+on+directv+now PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410030/normal_6042ff49b00f6.pdfIn PDF document text
    • https://cdn.sqhk.co/vuluzazogur/hggjxaB/betasubo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387241/normal_5fffceca64062.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxarulenogu/cNdrHZS/outer_planets_in_order_of_increasing_mass.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382405/normal_5fcd6c8fc64d7.pdfIn PDF document text
    • https://cdn.sqhk.co/lukuvekeliki/W7igggq/fakewo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490974/normal_601f566eaec38.pdfIn PDF document text
    • https://cdn.sqhk.co/pixefavenar/36CjgZn/jurokowulotipoxifiveraju.pdfIn PDF document text
    • https://cdn.sqhk.co/lenubire/WxyvIge/lologuroxexusaxute.pdfIn PDF document text
    • https://cdn.sqhk.co/xepiriza/c7hi1ge/78624917662.pdfIn PDF document text
    • https://cdn.sqhk.co/mixukavusu/ofRgejh/jhu_apl_high_school_internships.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba00df54-8b71-41d6-9076-d29618149d8f/balancing_chemical_equations_linear_algebra_calculator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b33f27b-d258-44f8-8a6c-b107ab7f18b9/sokikolekikaju.pdfIn PDF document text
    • https://e791dc30-71fd-4519-a75e-453748eb9c32.filesusr.com/ugd/8a5fcf_8abfce2bfb144b1b947a6e0742254d2c.pdf?index=trueIn PDF document text
    • https://95a57b4d-a24c-4412-bd87-88f4f885d252.filesusr.com/ugd/011e4b_5552a2e326704ecebf963510368bd606.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/405f2f8a-7991-47f4-8854-5e878ba23ac3/38045661085.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a86a1967-6b75-41ae-b7cd-0075977fccef/are_cal_spas_any_good.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eeab8bdd-573e-41b3-ba72-0b3d4c34870f/wuwuloba.pdfIn PDF document text
    • https://2a984544-7cb8-4a4d-9f60-e686f7994e39.filesusr.com/ugd/1434d3_a35c9b0a352940afb2114d1a48571205.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f507559d-2f36-4267-8b6d-c950b0d3c1dc/why_arent_my_pc_fans_spinning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c1a7954-8917-4092-9d02-9936df00d493/dorubotevazagofojapuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c160567-e012-4666-828c-c75a861b12bb/79587780592.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efe0a4c6-9b11-4a68-b875-bed919185c64/58191937912.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_off0000eb5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5F 5344 bytes
SHA-256: 856e4d3af9ce9d0490c2350117b8bb343aa9f968332a85c27ec1c334c5d1b584
font_01_sfnt_off0000fd78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD78 11504 bytes
SHA-256: 4f387486140b04acec7b18ebbb5044aa5e19d905b60dbcd4e033013e86dcb48f

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