Malicious PDF — malware analysis report

Static analysis result for SHA-256 f485b2a03536f094…

MALICIOUS

PDF

113.8 KB Created: 2020-11-14 01:49:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e7de37fa797f928786799f5e7ccb3bfa SHA-1: d81e68685c5000ec5137538e3ee9a963c2ca20d1 SHA-256: f485b2a03536f09444e613e47c94937fe2b3aa99162bae6105caa04983a4de99
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 0.9996

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://traffnew.ru/aws?utm_term=cahier+de+vacances+ce2+pdf PDF link annotation
    • https://luwinititik.weebly.com/uploads/1/3/4/5/134587042/kasogafedezi.pdfIn PDF document text
    • https://fetarulezi.weebly.com/uploads/1/3/4/4/134487317/552016.pdfIn PDF document text
    • https://lilepixot.weebly.com/uploads/1/3/4/4/134462463/9083196.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412902/normal_5f9d03a474a2f.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/b9fdcb3dac7c35.pdfIn PDF document text
    • https://fupexorugukemig.weebly.com/uploads/1/3/0/8/130814763/3997327.pdfIn PDF document text
    • https://bufazori.weebly.com/uploads/1/3/4/3/134377245/abe7fda45b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450046/normal_5fa89e2e70787.pdfIn PDF document text
    • https://melusibisi.weebly.com/uploads/1/3/4/5/134595399/fovixiwede.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/jamokaroxoj/leganuvimifowa.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/4958870230.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/adhesive_wall_hooks_for_painted_walls.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/pedawizidakalulifijokef.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/regujuzejukumexekuz.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/55903291380.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/terinumineravozefipo.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
    • 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15663 6864 bytes
SHA-256: 7ae164a73ee3e4de9047e294222b9c53e7df13250ab0f7e59e0ac30a4623017c
font_01_sfnt_off000167bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167BB 5308 bytes
SHA-256: ffdeb19c09f33fff1834f30ea9cdca1f58922547243e09a5a40ef1a75e1733cb
font_02_sfnt_off000179cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x179CB 13172 bytes
SHA-256: 10f86ae6d63cb5147c3d487f9029016c1a9a2978c7e8d8daab8f7718a11f3472
font_03_sfnt_off0001a2db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A2DB 16084 bytes
SHA-256: 492b72e9e8f0bcef963ad10e88f80b5598216a8c56d4f3a27963a6a5716a4957

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