Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e8aff2b9cc830a9…

MALICIOUS

PDF

82.1 KB Created: 2021-03-25 09:08:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8eed4c1a0642118c6f15027e5b332dfc SHA-1: 7f6ba78de8658e038f6c84cf2e51ffd73e87bc41 SHA-256: 7e8aff2b9cc830a9f59836df0c0a5fa48915d26564c10eb6d856eaf79093dc1f
134 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it is a link farm designed for malicious purposes, including a high ML score and ClamAV detection as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to passport photo guidelines, and the presence of external URIs like 'resalured.ru' indicates a redirection to potentially malicious content. No scripts were extracted, but the overall structure and URL findings point to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://resalured.ru/123?utm_term=us+passport+photo+guidelines
    • http://rrrrkkkkk.space/wedukogatalarasebanip1o1k3.pdf
    • http://xesifavaner.22web.org/wegevipomolopok.pdf
    • https://cdn-cms.f-static.net/uploads/4402745/normal_60399a460f27d.pdf
    • https://cdn.sqhk.co/kavuluxaja/eih2gcV/boo_at_the_zoo_baton_rouge_prices.pdf
    • http://lezagerodise.iblogger.org/3rd_conditional_conversation_questions.pdf
    • http://everydays.space/free_dating_sites_for_bisexual_females8s0ev.pdf
    • https://cdn-cms.f-static.net/uploads/4370275/normal_60262eef575c1.pdf
    • https://cdn-cms.f-static.net/uploads/4371010/normal_60531b93ef122.pdf
    • https://static.s123-cdn-static.com/uploads/4489615/normal_5fe30b3a1c5ef.pdf
    • http://mon-cmb.best/owen_meany_chapter_8_sparknotesn2jlh.pdf
    • https://cdn.sqhk.co/jivonaxadu/tggjjnK/41589055048.pdf
    • http://googsnat.space/microsoft_access_tutorialsxjjdx.pdf
    • https://cdn-cms.f-static.net/uploads/4462974/normal_604cdd7a1301c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://0621cc9e-6449-4e8a-a8bd-baee9ad62a2c.filesusr.com/ugd/affb4a_4272aff1d3c24d9d9fc95191b97da8e6.pdf?index=true
    • http://sejabozewilobog.epizy.com/vpn_proxy_chrome_android.pdf
    • https://28546a20-d0cc-4b82-bb4f-6711990cd5a3.filesusr.com/ugd/0bcf16_07e6df4a930e4d6e9307a8bd7dc21795.pdf?index=true
    • http://vupikefugogulup.epizy.com/15474561904.pdf
    • https://dba0ca6b-c979-46b3-87c9-041648dee063.filesusr.com/ugd/6f58fb_5ac2dcc526704882b181b58c02c7f7bb.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8ae5b6fa-56f4-4244-9b55-0eef503de689/50796393006.pdf
    • https://4b0cdf75-2e42-4830-99f1-bbdbaec3f661.filesusr.com/ugd/891219_b213bd31c7784737b7130e953472a13a.pdf?index=true
    • http://nawugem.epizy.com/public_administration_books_in_marathi.pdf
    • https://737c154f-ca75-4484-807d-9d5c19d76377.filesusr.com/ugd/7e84b7_d5606fd6e5fa4f909050355cf98577a4.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2ae62893-e2b6-4dd8-a8d1-a9ef8ec89c09/nesupinixederavagu.pdf
    • https://uploads.strikinglycdn.com/files/bcfc8e33-8384-4feb-a0c9-b8947b336c17/problemas_del_sistema_de_salud_en_estados_unidos.pdf
    • https://uploads.strikinglycdn.com/files/4178d3d6-140b-450f-abc4-f24c2ae262a4/important_quotes_in_chapter_11_of_the_secret_life_of_bees.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010415.bin
5ca9cec1884db07c67a0dd96ff9cc8b4a97166015744e8bf7ab37475fc187bfa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10415 5212 bytes
font_01_sfnt_off000115ca.bin
eb1a901143163fb1351738f601e914deda6c108043bc383232d5d8ba25f25935		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115CA 10876 bytes

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