Malicious PDF — malware analysis report

Static analysis result for SHA-256 c33ad9178a626c4e…

MALICIOUS

PDF

73.9 KB Created: 2021-04-03 03:02:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d9b146663dd545509330936780eecef SHA-1: 70440570c48c1b825ea67e84ad9d24e433675cf2 SHA-256: c33ad9178a626c4e68f08837cdf83223ce7d1a1560217fee16781d2920a8909d
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. One prominent URL, 'https://lozipotod.ru/wix?keyword=unblocked+games+66+awesome+tanks+2', suggests a lure related to online games. The presence of embedded URLs and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a malicious intent to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/wix?keyword=unblocked+games+66+awesome+tanks+2
    • https://sodomolu.weebly.com/uploads/1/3/5/3/135398587/6437737.pdf
    • https://cdn-cms.f-static.net/uploads/4386076/normal_60427ade9168f.pdf
    • https://static.s123-cdn-static.com/uploads/4425238/normal_600335e7b49f0.pdf
    • https://rekasefuwe.weebly.com/uploads/1/3/0/9/130969231/7fd0a.pdf
    • https://vefurubaturuxal.weebly.com/uploads/1/3/0/7/130739777/1508284.pdf
    • https://cdn-cms.f-static.net/uploads/4368788/normal_6060f3e1eecba.pdf
    • https://static.s123-cdn-static.com/uploads/4482215/normal_5ffd1036f35f0.pdf
    • https://cdn-cms.f-static.net/uploads/4450259/normal_5fe7b3f38e304.pdf
    • https://static.s123-cdn-static.com/uploads/4393362/normal_600348a0693e4.pdf
    • https://sililojakofatef.weebly.com/uploads/1/3/2/7/132712383/xanirabumufo-muzurunomor-malupo-porikukugig.pdf
    • https://cdn-cms.f-static.net/uploads/4459163/normal_5fe8d9318cabf.pdf
    • https://viwajojavejad.weebly.com/uploads/1/3/1/8/131858172/fesijetugisas.pdf
    • https://powonevupurig.weebly.com/uploads/1/3/4/7/134704952/461311.pdf
    • https://kasoguwetapita.weebly.com/uploads/1/3/5/3/135305743/nakatigusoliber-puxafevoxitabax.pdf
    • https://vusukiziroge.weebly.com/uploads/1/3/0/9/130969505/tizefuwujaxataz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://eed7fa7e-4f31-4ba6-8269-e73f07ac74c5.filesusr.com/ugd/93374d_696f3755c2234743aa39a46ceffe7c32.pdf?index=true
    • https://d1b6b380-f15b-462b-86b5-0b089ba7d90d.filesusr.com/ugd/f99a33_d2005dcd0b8a45ccbdb588b1ac565081.pdf?index=true
    • https://a2ae8793-a99f-480d-a3bc-849ef63d34f7.filesusr.com/ugd/cc207a_c2da541024654a80a6d4acf104663870.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e34d.bin
540719255aa21af9104b8e76209186d7f8f8ddb7798d61ed451b06634fa31860		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE34D 5736 bytes
font_01_sfnt_off0000f6dd.bin
1880de6201fb3a882595271494b81f382fa449a8bc07e316f325b161037881be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DD 10308 bytes

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