Malicious PDF — malware analysis report

Static analysis result for SHA-256 79bb0d3ba7ecf096…

MALICIOUS

PDF

77.0 KB Created: 2021-04-05 13:10:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2d5ae82d4b1c3156e92cb183476bb32 SHA-1: 68009addbcaf6e22260be75f8e771921d3ec8a74 SHA-256: 79bb0d3ba7ecf096128e4753cabdfcac6237ab84cf4a0cf7123618a678fe75f9
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, suggesting a link farm or redirection mechanism. The embedded URL 'https://lozipotod.ru/wix?keyword=big+head+football+unblocked+games+77' appears to be a lure, disguised as a game, likely leading to a phishing page or a download of a second-stage payload.

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=big+head+football+unblocked+games+77
    • http://wobifotos.mygamesonline.org/gumikuvo.pdf
    • https://korenumotijele.weebly.com/uploads/1/3/4/6/134687452/dokebuketezetil.pdf
    • https://cdn-cms.f-static.net/uploads/4528780/normal_6063fe5d397bf.pdf
    • https://static.s123-cdn-static.com/uploads/4416321/normal_5ff8baf9b4224.pdf
    • https://cdn-cms.f-static.net/uploads/4370303/normal_601f8fc293c84.pdf
    • https://jevekezimap.weebly.com/uploads/1/3/4/6/134624871/ponoramaniruz_kijeku.pdf
    • https://static.s123-cdn-static.com/uploads/4483833/normal_5fe15e3349943.pdf
    • https://vefesipawadupo.weebly.com/uploads/1/3/4/7/134746991/joduwudikibalop-pizuvenonojevim-sajipizeji-felavavokitamog.pdf
    • https://static.s123-cdn-static.com/uploads/4465387/normal_5fc9cbb129480.pdf
    • https://tavoledunu.weebly.com/uploads/1/3/4/7/134708600/xosur.pdf
    • https://gulapizebulo.weebly.com/uploads/1/3/1/0/131070336/pijaresusovunem-neruzubagurixub.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://0115c081-d8bc-4983-a705-81db93bf1442.filesusr.com/ugd/990402_3b1c875a89484415973de1616d6e4290.pdf?index=true
    • http://rijemow.onlinewebshop.net/management_of_ludwig_s_angina.pdf
    • https://98771922-91e4-4673-aa0d-7794f4435593.filesusr.com/ugd/b6aaa0_7aa4b6f3ee6040d79110bb56ea9061af.pdf?index=true
    • https://9d76d0c6-5807-43ac-a2ba-7b4112d1a20a.filesusr.com/ugd/5cd33b_cb1fb51fe4544555908782c1cfa6c0bf.pdf?index=true
    • http://saxodanokijaj.atwebpages.com/miwedetido.pdf
    • https://6c9aa500-f8d9-42a6-b8a4-5b3c562bbfc3.filesusr.com/ugd/543886_a1f62cd4065b44e1a0a9c5882d658e39.pdf?index=true
    • http://vobozezojip.onlinewebshop.net/poweredge_r640_manual.pdf
    • https://68e1e3d4-268d-49bc-a8aa-b119cb10fea7.filesusr.com/ugd/3ceeb9_288c32b0609448c3b49ec5b583ee6828.pdf?index=true
    • https://1e16f6d7-285b-4488-bf07-d3e24ac90e20.filesusr.com/ugd/417718_9d316a333d814327b3ac56ea874f97e3.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_off0000ef9b.bin
b4046f4742a2b05625d519699c9a070507d3d93fc2e05873ef2c1ef0909c7773		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9B 5672 bytes
font_01_sfnt_off000102d3.bin
f0fa0ec1d989434d0d0a23bfc9331cce59ba1b74cb37a706ed1a33336afab310		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102D3 10456 bytes

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