Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e57e994f2bb48c2…

MALICIOUS

PDF

78.2 KB Created: 2021-04-04 00:59:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 80e888ceeb1fc03b744dad1cdf81e98f SHA-1: a801c1364b74f0d4fb00e9baf61f51ab8ba0705d SHA-256: 1e57e994f2bb48c2cc7256663f537a78b0d23ba1c5168244306937634162e18c
244 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to disposable domains or known malicious redirectors, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing sites or potentially download further malware. No scripts were extracted, but the document's structure and embedded URLs are indicative of a link farm used for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/aws?utm_term=how+to+remove+sim+card+from+lg+stylo+5 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4451210/normal_60289fc0b4f94.pdfIn PDF document text
    • http://tagepalalog.iblogger.org/business_administration_and_finance_burlington_books.pdfIn PDF document text
    • http://bcpzonasegur4viabcp.com/ros_launch_gazebo_pluginwph6m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465403/normal_6056164b1ec05.pdfIn PDF document text
    • http://jerimujolegem.medianewsonline.com/lulimamevorepekuxemupinu.pdfIn PDF document text
    • http://vsedlyatebya.xyz/harris_and_benedict_formule5rgg6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366676/normal_603ee5d9435fe.pdfIn PDF document text
    • http://rogijowop.sportsontheweb.net/16035970486.pdfIn PDF document text
    • http://wupemokabate.scienceontheweb.net/vivawopisefivir.pdfIn PDF document text
    • http://bebalezuve.medianewsonline.com/lelokubuzokek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_6017bfd53b1e0.pdfIn PDF document text
    • http://zadamisofegeku.22web.org/what_does_dishonorable_discharge_mean.pdfIn PDF document text
    • http://freshmind.net/shopsmith_scroll_saw_partsbhdo9.pdfIn PDF document text
    • http://insurancesouk.com/bimemufuvirikevibafipofes9oqid.pdfIn PDF document text
    • http://nubekamejulug.iblogger.org/30205565025.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0a37a3d5-a0bf-4e77-8ff5-6127fd08aefa.filesusr.com/ugd/6046c9_c9dbcd94f0534c05879e911ff3a1190d.pdf?index=trueIn PDF document text
    • http://nexizali.epizy.com/periodic_table_quiz_with_answers.pdfIn PDF document text
    • https://c3d762b3-5d50-4891-ab6d-43710edd2423.filesusr.com/ugd/3254bf_264380f428b3477ab35746daa0c65427.pdf?index=trueIn PDF document text
    • https://ed0f7819-48b4-4c0d-9119-93de03d81b9c.filesusr.com/ugd/e481ce_c110e2ccc863400fa5c3abd67adbf05a.pdf?index=trueIn PDF document text
    • http://sogivuwe.onlinewebshop.net/89235804116.pdfIn PDF document text
    • https://1e16da7b-5b4f-4122-a3c4-5c88c9d97cf7.filesusr.com/ugd/83f04e_91b077d7ab6d451c8e438d27ae3ed0fd.pdf?index=trueIn PDF document text
    • https://d4508431-0eee-4913-ac2a-2ec907ed9b18.filesusr.com/ugd/12daa7_a49928c1337f437faba390a93b895105.pdf?index=trueIn PDF document text
    • http://dotabujov.rf.gd/dasurudalekofibosun.pdfIn PDF document text
    • https://ca108e69-7b6b-43f0-8f16-d96ebeb8a33d.filesusr.com/ugd/79e0dc_a9611c7ee3db48a4bd3f47cb9e3fbad4.pdf?index=trueIn PDF document text
    • https://02687da8-bf2b-436b-a8ca-82c6e04513a5.filesusr.com/ugd/e48f8a_5428b72c0dd4437dad379644ad86ac56.pdf?index=trueIn PDF document text
    • https://8c1dc56a-a131-4b43-acff-3635b9115217.filesusr.com/ugd/90423f_dc41d6f0bc1546068723ec0eaa2dc1d8.pdf?index=trueIn PDF document text
    • https://f87ce62f-3d5d-4c42-bff3-2e7d00444551.filesusr.com/ugd/72ed28_bdcb9f44669f426b86f9cb7aa51ac28d.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f36a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36A 5680 bytes
SHA-256: 7c65af4c201406d041991225e51b5be47094f7661e227fdfa607c26b61bc3be6
font_01_sfnt_off000106ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106CA 10636 bytes
SHA-256: c7cb0098f349e72d55f710834e971fd271c4f70482fb05f6b2c9febb7ba3da54

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