Malicious PDF — malware analysis report

Static analysis result for SHA-256 068a5eab76a5b6f2…

MALICIOUS

PDF

88.4 KB Created: 2021-03-22 14:10:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9ecb4a3538a45bdb698597281aa310f SHA-1: ba0d80477b6f12d18bf4e7be1fed16b67f8b35a2 SHA-256: 068a5eab76a5b6f2e1f5903d3bc5e2e7d124f2ff01a2320b25fea8507817e8f3
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 link farm. The primary URL, 'https://vilenefex.ru/award?keyword=apotheken+umschau+pdf+download+2020', suggests a lure to download a PDF, likely to distribute malware or phish for information. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://vilenefex.ru/award?keyword=apotheken+umschau+pdf+download+2020
    • https://manesufepal.weebly.com/uploads/1/3/1/3/131381078/xuzotavidirisawawifu.pdf
    • https://sazotavivi.weebly.com/uploads/1/3/1/1/131164406/lemerapo.pdf
    • http://rejemezurufoveg.mywebcommunity.org/85349960942.pdf
    • https://dazujaxika.weebly.com/uploads/1/3/1/4/131437396/tokasipure-bopuwazamufu.pdf
    • https://nozirurabi.weebly.com/uploads/1/3/0/7/130738896/ea71d0f188f4fc.pdf
    • http://wubufusimeveve.22web.org/48969543869.pdf
    • https://pejeronasoko.weebly.com/uploads/1/3/2/6/132682646/tusilexiwuxeg.pdf
    • https://static.s123-cdn-static.com/uploads/4367916/normal_6001942d94f3c.pdf
    • https://cdn-cms.f-static.net/uploads/4483088/normal_601b9e477f139.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://fa202315-5cd5-4006-9a99-7c5d4406650e.filesusr.com/ugd/61804c_451b67c1f2394e8abc40e2abac3483f6.pdf?index=true
    • http://nupuzawov.onlinewebshop.net/multiplication_sums_for_3rd_grade.pdf
    • https://uploads.strikinglycdn.com/files/fa01eebc-c63c-479f-97d4-8e499cad7e2a/58942850700.pdf
    • https://uploads.strikinglycdn.com/files/ae044cd7-ad7c-4b51-836a-ea99192f7989/danezifopavebijumadu.pdf
    • https://2987c0f4-171e-4473-b3f1-a5468658115b.filesusr.com/ugd/75ff8a_815b8b4c3ec44b76b7754387311b224b.pdf?index=true
    • http://debumiputun.rf.gd/jodaremasosuwogikegevog.pdf
    • http://napalujimawoz.rf.gd/pegekiwazewafowuvudi.pdf
    • http://fanupola.epizy.com/d-link_dap-1610_e_wlan_ac1200_review.pdf
    • https://uploads.strikinglycdn.com/files/24cb116e-6095-4a54-9b62-2d14ec25ea71/danun.pdf
    • https://044e8d80-c429-4a1f-820d-9b443c65b389.filesusr.com/ugd/53c654_57c393fec6d94ec198de0e1f2b8defad.pdf?index=true
    • https://4fe85328-8dbf-40e9-afa8-2c8d6ff8a9c8.filesusr.com/ugd/9c0842_372abc6d32564e97b622255a75ae8f3f.pdf?index=true
    • http://sorisavitekinuj.onlinewebshop.net/74472718040.pdf
    • http://gajutar.onlinewebshop.net/rumafagiwigemalerasage.pdf
    • https://f2d828cf-06d9-46ea-85af-d88b0bc20d44.filesusr.com/ugd/501a20_aae30c7dfec5478cb1a93bc3ed7dfd95.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001097b.bin
28870ac3ffcf4671eee0693551009d73319815f1ae3b304a7f13f44b2081b35f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1097B 5552 bytes
font_01_sfnt_off00011c48.bin
ab945eab3b050f0197bd6d7bc9c48e284eafa9490391fd7a0c8ebb6996c6fb7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C48 12152 bytes
font_02_sfnt_off0001440d.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1440D 4324 bytes

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