Malicious PDF — malware analysis report

Static analysis result for SHA-256 10c1bec6f121723c…

MALICIOUS

PDF

92.2 KB Created: 2021-03-20 13:53:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f94b025a46af891ff6b800bc584b5eb SHA-1: 16902b019fd23af7558379fc5359c891ed462c9d SHA-256: 10c1bec6f121723c8a1cec221df0732b27a6295dfc973644f87a50addd8b31c6
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO spam or phishing campaigns. The primary external URI points to a URL that mimics a search result for a popular movie, suggesting a lure to a malicious site. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/wix?keyword=baahubali+2+the+conclusion+watch+online+free
    • http://creampiepow.club/romancing_saga_2_switch08939.pdf
    • http://rineset.xyz/manizarusobujikegibek4eqri.pdf
    • http://vetebozo.mypressonline.com/28089742498.pdf
    • http://center-san.ru/gabidopemolte5c.pdf
    • https://voxalasodakuro.weebly.com/uploads/1/3/4/0/134042561/vepobajibebop.pdf
    • https://demaxezobenila.weebly.com/uploads/1/3/1/8/131856353/6417858.pdf
    • http://xifasiv.getenjoyment.net/how_long_to_learn_algebra_2.pdf
    • http://pikajavepe.iblogger.org/jebesigesupifanekofanaxu.pdf
    • https://gebobofivogaxe.weebly.com/uploads/1/3/5/3/135308574/vupedasaselukixuxuse.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/ximupuv/82508769145.pdf
    • https://s3.amazonaws.com/wiwuxot/66619278936.pdf
    • http://voxomat.epizy.com/andromeda_strain_ending.pdf
    • http://wenuwobowikowax.rf.gd/figulerob.pdf
    • https://uploads.strikinglycdn.com/files/78734f55-429e-4d8a-a8e8-e44cc4b70096/83368397409.pdf
    • https://s3.amazonaws.com/tuxenipup/cartographic_projections.pdf
    • https://s3.amazonaws.com/pilazi/miruzotapamaka.pdf
    • https://uploads.strikinglycdn.com/files/7218fb53-3a90-4a55-8dff-9850bef98859/68107795756.pdf
    • https://uploads.strikinglycdn.com/files/2aadefcf-5384-4811-9c9b-25bb598aaa90/city_of_the_beasts_free_download.pdf
    • https://s3.amazonaws.com/kigavanus/how_long_to_cook_turkey_breast_in_masterbuilt_electric_smoker.pdf
    • https://uploads.strikinglycdn.com/files/e7617c1c-735c-47bf-a8c3-df6c2dc56f32/urdu_meaning_of_deterrence.pdf
    • https://uploads.strikinglycdn.com/files/2e135455-7c16-4ca5-b3d5-15980b24d8f1/repigugumezituk.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e0f.bin
caf3ba7cd517cfa0c6f0133d7b6ad4ca0fce5ee8ad4c061b626069a01751da80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E0F 5264 bytes
font_01_sfnt_off00012ff9.bin
7777531d8bb6bcd6959fbd0c32c59f2dfdecc2487d27bcac1707925fa82e4ed0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12FF9 11084 bytes
font_02_sfnt_off0001555f.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1555F 4324 bytes

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