Malicious PDF — malware analysis report

Static analysis result for SHA-256 62164e9d56972b48…

MALICIOUS

PDF

55.8 KB Created: 2020-04-01 13:19:21 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 3bde612a1ecc811d3c6df27a8cfa4c99 SHA-1: 78fc49be5b24318b43b7a30cb6bead746f0c11f5 SHA-256: 62164e9d56972b48f57a7e3ab89f7f40f7fe3096d5fb6f93505a97b8628a66a4
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links to other PDF files hosted across various domains. The heuristic 'PDF_SEO_LINK_FARM' indicates this is a link farm, suggesting the primary purpose is to manipulate search engine results or to distribute a large volume of content, potentially malicious. No scripts were extracted, but the sheer volume of outbound links is highly suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 http://evolveohio.com/uploads/1/3/0/8/130874010/130874010.html#que+es+la+equilibrio+en+educacion+fisica
    • http://robertgertz.com/uploads/1/3/0/2/130272985/ec6f74.pdf
    • http://burlingtonprocessservers.com/uploads/1/3/0/8/130874300/1e483584.pdf
    • http://krownedbykenyakollection.shop/uploads/1/3/0/8/130813630/fuferuvavuniv-xoketidewaxagok.pdf
    • http://almightyhomepropertiesllc.com/uploads/1/3/0/2/130289019/zajipona_fumime_toduj_mopad.pdf
    • http://avescopywriting.com/uploads/1/3/0/6/130604270/4967819.pdf
    • http://narrowbandyourradio.com/uploads/1/3/0/2/130289252/1465539.pdf
    • http://tdachospitality.com/uploads/1/3/0/2/130289222/jupotobul.pdf
    • http://shrinkingvioletjewellery.com/uploads/1/3/0/9/130969358/7740434.pdf
    • http://dam-rh.com/uploads/1/3/1/3/131379844/tizegovigam-wabupew-fofubazikebug.pdf
    • http://biasg.org/uploads/1/3/0/6/130621278/zixiv.pdf
    • http://bluebirddollshoppe.com/uploads/1/3/0/9/130969260/bepivolubuvuwov_tesilino_tukusis.pdf
    • http://masterfuljourneys.com/uploads/1/3/0/7/130739583/5284ce5e8.pdf
    • http://mamasgracebirthservices.com/uploads/1/3/1/4/131406610/jadireb_zevoti_vivolipuzike.pdf
    • http://nellysuitsyouswimwear.com/uploads/1/3/0/5/130539913/904999.pdf
    • http://lipglossmarketing.com/uploads/1/3/0/7/130775768/559723.pdf
    • http://prolinesecurity.net/uploads/1/3/1/3/131379256/pogulekobomu-sogepiwikobutan-zesulijaga-vazevijep.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ab1a.bin
0661ac4edca23096a838e46d8a2f92889c9f97e7152a9210018f598be4845fc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB1A 10412 bytes

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