Malicious PDF — malware analysis report

Static analysis result for SHA-256 edc4fc7f094c7aa9…

MALICIOUS

PDF

76.8 KB Created: 2021-06-11 06:38:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: c9a367a5cb67f8180f4cee142705de04 SHA-1: a9b59d49037f47960d591633fb85c41ff2711830 SHA-256: edc4fc7f094c7aa9773c4b70cf3e8b243661ce4391e75d3d01299b40df8513fc
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation scheme. The primary malicious URL identified is https://allytemp.ru/pbw?utm_term=8+ball+pool+play+online, which is likely used to redirect users to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://allytemp.ru/pbw?utm_term=8+ball+pool+play+online PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450350/normal_6037ca3fa5751.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497697/normal_5fee8d3959c76.pdfIn PDF document text
    • https://nuvafuriwevejuf.weebly.com/uploads/1/3/2/8/132814848/1e1dc1c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426547/normal_606b9707247e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392649/normal_60c175260d289.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4445119/normal_60afea5709410.pdfIn PDF document text
    • https://jilanuma.weebly.com/uploads/1/3/4/5/134522828/nefibepi-xivadufuwawafap-teguxafu-wudib.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
    • https://uploads.strikinglycdn.com/files/6946fafd-164a-463a-ba4b-f01eaf6f65ba/niwubupusara.pdfIn PDF document text
    • http://refarumiba.pbworks.com/w/file/fetch/145102980/76473238558.pdfIn PDF document text
    • http://visetululiv.pbworks.com/w/file/fetch/144415332/2019_dodge_challenger_hellcat_redeye_hp.pdfIn PDF document text
    • http://jalosozamiz.pbworks.com/w/file/fetch/144963717/55612819550.pdfIn PDF document text
    • http://ditidema.pbworks.com/f/tum_bin_2001_full_movie_480p_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80413731-732d-4448-816a-aec479d9c454/siximolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/851f5656-b60c-4962-9ee9-f167c6d43629/55793228016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/584b2dc7-195c-4445-bd8f-5473926c9b4d/how_to_connect_bluetooth_to_pioneer_avh-200ex.pdfIn PDF document text
    • http://divogatupum.pbworks.com/f/new_tamil_movies_download_2021_isaimini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed4b7978-92f2-4934-b969-b89d16eeddff/89720585876.pdfIn PDF document text
    • http://lisidasaxow.pbworks.com/f/mini_militia_unlimited_flying_power.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89d411c5-8984-4e3d-8dc1-09c5f621986b/45260970744.pdfIn PDF document text
    • http://beratirupo.pbworks.com/f/rita_mulcahy_audio_book_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7283bf0a-aec9-4631-9cc2-f5867a433f57/how_to_fix_a_seized_small_engine.pdfIn PDF document text
    • http://morabef.pbworks.com/f/how_to_dupe_money_lumber_tycoon_2_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66d30063-c746-4594-9d5a-c1b00cfe8dc4/euro_truck_simulator_2_key_steam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04063316-51cc-4ba6-858a-8ed08da31712/refagerevurusi.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_off0000e36b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36B 4588 bytes
SHA-256: 551591888b8bcf02ad5ac43d1700035066f58f1c07b403fd80b245a14633f0dd
font_01_sfnt_off0000f2fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FE 10124 bytes
SHA-256: 92b5dddefd873e1f0f15024af9de2724f45cafe436b2aedc6399e2e29882f604
font_02_sfnt_off000115a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A0 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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