Malicious PDF — malware analysis report

Static analysis result for SHA-256 8844078814842b77…

MALICIOUS

PDF

82.5 KB Created: 2021-04-30 08:20:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 926824f668652863808f4d1e270a153b SHA-1: 2bf39ad72df34610b6c1dfcd8a3b405d1f0ba374 SHA-256: 8844078814842b77393741f824a712ee7f2dbf98f9f4406ce840f1b57736f166
196 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a link farm and a phishing lure, specifically mentioning remote support code, suggesting a pretext for malicious activity. The embedded URL points to a site that appears to be part of a link farm, likely intended to redirect users to malicious content or phishing pages. While no scripts were directly extracted, the PDF structure and heuristics strongly suggest a malicious intent to trick users into visiting external, potentially harmful, URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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.
  • Remote-support code/control handoff high SE_REMOTE_SUPPORT_CODE_LURE
    Document asks the user to share a remote-support code, connection ID, or allow control in the context of remote-access software
  • 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://midufefew.ru/strik?utm_term=how+to+record+online+meeting PDF link annotation
    • http://filfex.ru/laxisipafufimazopopsswc3.pdfIn PDF document text
    • http://idealica-official-it.website/economia_del_modo_de_produccion_feudal1ei8h.pdfIn PDF document text
    • http://anrostore.ru/online_poker_deutschland_2021f4tyk.pdfIn PDF document text
    • http://bachanalytics.com/xorazevabutexavoxu37sqt.pdfIn PDF document text
    • http://lupapezatuna.22web.org/fonebimamudiz.pdfIn PDF document text
    • http://limons.space/weather_report_kodiak_ak4t2a2.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://fobonerenajob.epizy.com/abnormal_psychology_a_south_african_perspective_textbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb8cb343-0a2e-4b05-83ed-9db707e8bc91/audacity_para_mac_os_catalina.pdfIn PDF document text
    • https://s3.amazonaws.com/gekojulog/14753491670.pdfIn PDF document text
    • https://77a48bbd-706a-45f8-a225-ac1cc02029d7.filesusr.com/ugd/3be48b_7f0e9941db7f44cfa900c7d459be15a8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5f610d4-4f57-4a70-a093-b8898b6e5458/76312678819.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/gabutexodakufawapeza.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/what_is_the_full_form_of_mica.pdfIn PDF document text
    • https://dd67658a-cc17-4e1c-bca5-42bf299a485b.filesusr.com/ugd/07a440_3444f660124444f8ac0b7c0440e571d1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/diverse_learners_guide_ldoe.pdfIn PDF document text
    • https://95fbbc11-640f-4658-acdf-6e09da746871.filesusr.com/ugd/e42ee3_76334da54eb8425f9c523d68f74f5092.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/percy_jackson_and_the_singer_of_apollo_weebly.pdfIn PDF document text
    • https://493f174a-a540-412c-bacb-e5b7b26cbfcf.filesusr.com/ugd/95bb70_3633a51c398e4709a8641ca9fc580748.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ded0f645-09b0-4430-b66e-31276398a86c/jasafanekevimitofikav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/107281c6-5237-496c-86d7-4bd1670136f1/negogevisafofuwup.pdfIn PDF document text
    • https://ffb80149-315c-4936-8637-e87477b606fc.filesusr.com/ugd/e7410d_bdd7e8bc66214916a15ccda8bfd3626f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/paul_clifford_edward_bulwer-_lytton.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_off0000f878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF878 4712 bytes
SHA-256: b614f35748591c127ae1a27106f258c6f79248d8d5514b4a5d82263a432b77ec
font_01_sfnt_off0001086c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086C 11056 bytes
SHA-256: 8291b6667e6e8a94f9c281808ef041339a75d4eac7cd8113e6e91ae7800d4aa7
font_02_sfnt_off00012e05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E05 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c