Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eb99a3adb84964d…

MALICIOUS

PDF

82.4 KB Created: 2021-03-25 23:21:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1852264f681d6515f1c62cf804d21fe0 SHA-1: 7a283cdf8d8d643a87ec6e8c64fcf28279848c72 SHA-256: 7eb99a3adb84964d9e986eaf273ca07139a4960a90542bdc29b254b599ec62d4
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a primary focus on directing users to 'seumenha.ru' under the guise of an 'award' or 'contract'. Heuristics indicate this is a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URIs strongly suggest an attempt to exploit users via social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://seumenha.ru/award?keyword=afscme+31+contract+pdf PDF link annotation
    • http://chambreop.xyz/pedagogy_of_the_oppressed_summary0q5js.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414161/normal_5fdc37f0cbb00.pdfIn PDF document text
    • http://the-english-temple.com/cateye_micro_wireless_cc-mc100w_battery_replacementsrgji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474170/normal_604a49ef27688.pdfIn PDF document text
    • http://nubolutlion.xyz/8532041095458qxy.pdfIn PDF document text
    • http://fudoviwil.mywebcommunity.org/adjectif_pithte_et_attribut_exercices_corrigs.pdfIn PDF document text
    • http://lizoguxumugef.mywebcommunity.org/juzotozenevu.pdfIn PDF document text
    • http://ferafukapawap.scienceontheweb.net/application_letter_for_elementary_teacher_fresh_graduate.pdfIn PDF document text
    • http://bathforlegs.xyz/givaniwadasotanijosez3ne24.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fuvarijes.atwebpages.com/atlas_of_sustainable_development_goals_2018.pdfIn PDF document text
    • https://fb075467-9d00-46c6-93ac-2b777f5e584b.filesusr.com/ugd/8bcd66_0469ca7a46d6471f8b159c3555fd7203.pdf?index=trueIn PDF document text
    • https://108bb973-5399-4bf7-a70e-a18780752cac.filesusr.com/ugd/760a88_1a24db6fbd704ce98e2c17440fefbd3e.pdf?index=trueIn PDF document text
    • http://vidoniwofunevan.onlinewebshop.net/basketball_strength_program.pdfIn PDF document text
    • https://42e65457-ec34-4553-8979-78b6e302f774.filesusr.com/ugd/f1976d_216f8b93a8034148b952ee23b39906f5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dalava/animated_emojis_for_android.pdfIn PDF document text
    • http://sijadogif.atwebpages.com/toxinu.pdfIn PDF document text
    • https://a1c9bafd-2917-4c1b-b79c-a4b44a941470.filesusr.com/ugd/f0f215_0ca6ef657fee42cc97f693c7d8478edb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/faxaxos/watch_call_me_by_your_name_full_movie_english_subtitles.pdfIn PDF document text
    • https://711a90e7-97f2-4eab-8690-3003ec1e9b64.filesusr.com/ugd/a0905b_465bba1aacb446ed81944fee3b83ba70.pdf?index=trueIn PDF document text
    • http://gumizaxewa.atwebpages.com/2017_amc_10b_solutions.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DD 5212 bytes
SHA-256: 6b5510c5b11bee807b0e247cf254f01e41c1d28ade87c9042004bf613b65a8c6
font_01_sfnt_off0001086a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086A 11080 bytes
SHA-256: 5c8bb00229dbf87636bbf76e17616c86d58843b75bf3f98ad4e8ffd501c1268d
font_02_sfnt_off00012e17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E17 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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