Malicious PDF — malware analysis report

Static analysis result for SHA-256 80a37608e3920864…

MALICIOUS

PDF

128.3 KB Created: 2021-02-22 10:46:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d49f85f033f4efc08c132a8c2a9ab6b9 SHA-1: 5a3809d7b84733e8ffe2ad3ca85f577b42520fcb SHA-256: 80a37608e3920864d6ff950d4a6a0c4057c82441f6f7a8cd2048db30b5d6d1c4
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the 'PDF_SEO_LINK_FARM' heuristic, suggesting a link farm or redirection scheme. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics confirm its malicious nature, with ClamAV identifying it as a phishing trojan. The presence of embedded URLs and the overall structure point towards an attempt to lure users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://baarspo.ru/strik?utm_term=the+stranger+camus+quotes PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4382190/normal_5fde4e6ccaf81.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393511/normal_5fff48d0866c7.pdfIn PDF document text
    • http://konovulibugu.iblogger.org/64115937999.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459654/normal_5fe3024976991.pdfIn PDF document text
    • https://sakolepak.weebly.com/uploads/1/3/4/5/134588428/dogixikumorakotep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412387/normal_5fe3c09b2f61c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383131/normal_5fe6c26f4008c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473902/normal_5fec5a3e574fb.pdfIn PDF document text
    • https://jadivamanug.weebly.com/uploads/1/3/4/8/134868371/ninetiduwudiletaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495413/normal_5fd325af809ec.pdfIn PDF document text
    • https://dibevoxatatot.weebly.com/uploads/1/3/1/1/131164568/6631309.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368246/normal_5ffc2c708ae12.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/rimepusox/42804650185.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/gafaxipoxizosenedenexen.pdfIn PDF document text
    • http://wafibajew.epizy.com/wetabokigolegaromeroziv.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/baldor_bench_grinder_operator_s_manual.pdfIn PDF document text
    • http://rimadijek.rf.gd/itemised_budget_template.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/class_12_chemistry_practical_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/60268267893.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0001c14f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1C14F 28264 bytes
SHA-256: 8df8ab13caead70176607d09d0d7ae7424acb82d689408457abeb97f97711d0d
font_00_sfnt_off00016c1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C1E 6440 bytes
SHA-256: edf517a561ed5132c6c1d5718ac6ff9d870a00e6f43a91762fd168a2279cca75
font_01_sfnt_off00017c14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C14 5256 bytes
SHA-256: a0ef5496b023b2a82469f3a7a58e07e2a005435aa1a1b9878a3052256e5c11c6
font_02_sfnt_off00018dc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18DC4 18320 bytes
SHA-256: 6af2eddb37d693e92f911a17eafc7ddf6b89425c3ee393a54969a634255c14db

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