Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7b187872f5c226e…

MALICIOUS

PDF

78.0 KB Created: 2021-05-11 11:42:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: c465b2ecb1c890631124d640e43b10b7 SHA-1: 54c07946bc67608716fcd2606a08c8c221115ef6 SHA-256: c7b187872f5c226e25722ae3be3724a292a405c272a88b727571b30101d90a6c
68 Risk Score

Malware Insights

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

The PDF document contains embedded URLs that redirect to a suspicious domain, disguised as a search result for a common query. The ML classifier strongly indicates maliciousness, and the document's structure suggests it's designed to trick users into visiting a potentially harmful site. No scripts were extracted, but the presence of multiple external URIs points to a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • ClamAV scan did not complete info CLAMAV_SCAN_INCOMPLETE
    ClamAV scan on this file did not complete (ClamAV error (exit -15)); the verdict reflects only static heuristics. The result is not cached so a later submission will retry the scan.
  • 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://gimoguvi.ru/strik?utm_term=what+is+4.5+litres+in+pints PDF link annotation
    • https://cdn.sqhk.co/lokijuzim/ishdIjf/27977475897.pdfIn PDF document text
    • https://wupugosow.weebly.com/uploads/1/3/1/3/131382590/125cc74519bf.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/social_media_today.pdfIn PDF document text
    • https://cdn.sqhk.co/gusiloxi/hiwOSGy/90881277152.pdfIn PDF document text
    • https://fezugewibopav.weebly.com/uploads/1/3/5/3/135346468/lununimug.pdfIn PDF document text
    • http://lorakuze.sportsontheweb.net/68248443251.pdfIn PDF document text
    • http://tibijuwubato.iblogger.org/bosch_dishwasher_junction_box_recall.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dfdccaec-9019-42eb-ab8c-14eed22d5f88.filesusr.com/ugd/2e00cc_c1f59041adc640e28470e94c2ba9eddf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/446a18d9-6e5a-4002-8e2e-cc3be1a4b7bc/what_is_hidden_curriculum_in_relation_to_moral_education.pdfIn PDF document text
    • https://da54c32a-99c7-4590-8520-800dd2d1cae3.filesusr.com/ugd/7973d2_8a909c39b6ff46368e75c1eeb5e470dc.pdf?index=trueIn PDF document text
    • https://196cdf53-7a38-4f80-8f5e-3ad65c24f50e.filesusr.com/ugd/e5a593_665c641992be4a059da79e7f4c42992b.pdf?index=trueIn PDF document text
    • http://mifazafodig.rf.gd/lajupaliwuwudakidena.pdfIn PDF document text
    • http://taribizuka.epizy.com/kuvadamon.pdfIn PDF document text
    • https://044ec7df-721b-4788-b209-87474a3fcb06.filesusr.com/ugd/60ffa2_90e61debd1ee4104b137f06d048606a3.pdf?index=trueIn PDF document text
    • https://ce2645ba-e89a-43d5-afff-5c0150757291.filesusr.com/ugd/c63dba_c7e575f070354012ab1c4a855eb59fcc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a0269b2-e39c-44d8-9eeb-3d753bf629c5/sojavagonerule.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0F 5164 bytes
SHA-256: fe6d70cbb1690ce530446fa342708f6afdde5261638559464ec7ec353dbe5253
font_01_sfnt_off0000eeb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB6 11260 bytes
SHA-256: 917e21263e63473f0564563555d6b3ae8234c83b1198b5d6d35608f801cf7014
font_02_sfnt_off00011568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11568 16236 bytes
SHA-256: 74e4899ddb0ba07bd001f22450395ae4396a1227aa2a7379d41b1ba62eac79e1

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