Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ec6c41dd48f6ad3…

MALICIOUS

PDF

81.6 KB Created: 2021-04-05 05:04:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e487e3fc841afd80dc238fd339def1b SHA-1: 7abaea60a40fecfb34f4154163cda303a02bbae8 SHA-256: 1ec6c41dd48f6ad3096a5f2950e4e61d3af686378ee1fb859ffcec2e339dde94
146 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers. It contains numerous embedded URLs, with one prominent URL pointing to 'lozipotod.ru' which is associated with a phishing lure for 'software project manager jobs'. The heuristic 'SE_CLOUD_DOC_LURE' indicates the document impersonates cloud storage services, further supporting a phishing or credential harvesting motive. No scripts were extracted, but the overall structure and URL suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://lozipotod.ru/strik?utm_term=software+project+manager+jobs+near+me
    • https://jukovuwivoxufab.weebly.com/uploads/1/3/3/9/133997180/5787000.pdf
    • https://cdn-cms.f-static.net/uploads/4383678/normal_6039163400d1d.pdf
    • https://static.s123-cdn-static.com/uploads/4489598/normal_5ffc2361600e2.pdf
    • https://cdn-cms.f-static.net/uploads/4403684/normal_604fc0bf23848.pdf
    • https://cdn-cms.f-static.net/uploads/4380871/normal_6068fbd8686e9.pdf
    • http://vemelaribox.getenjoyment.net/bsc_1st_year_maths_question_paper_2020.pdf
    • https://static.s123-cdn-static.com/uploads/4383802/normal_5ffd579111641.pdf
    • https://xevoniwibefi.weebly.com/uploads/1/3/5/9/135984774/mefulimobuvakuwakumu.pdf
    • http://koparikamoze.scienceontheweb.net/neumonia_bacteriana_en_perros.pdf
    • http://jabilevij.mypressonline.com/datigonirupot.pdf
    • https://jematujevuzonip.weebly.com/uploads/1/3/4/2/134235480/wogikusaxa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rawesaragegugar/sanuvomunajavedakojupo.pdf
    • https://95043331-d9de-4498-ad98-35b8ac3ee23f.filesusr.com/ugd/5740b2_da74873494344982a427fe40bdb2561b.pdf?index=true
    • https://68fdcf0a-b1f0-4758-9edf-48d2be6d990b.filesusr.com/ugd/ac51ce_99cdd06514ad4ca0857ee4943de71fa1.pdf?index=true
    • https://s3.amazonaws.com/selivuvumepaveb/65183493973.pdf
    • http://tizexazebubo.atwebpages.com/better_than_before_synonym.pdf
    • https://s3.amazonaws.com/zabevog/36226310648.pdf
    • https://3d6da986-5be3-4955-9d5c-e891e6c56a45.filesusr.com/ugd/3c671a_1b7910d94bee4a788aae9b38001e1346.pdf?index=true
    • https://71a5d838-4e22-4830-8da1-7955ec3365f5.filesusr.com/ugd/f2f43e_726b76abafd042e5a2ea9a22472fbb84.pdf?index=true
    • https://171e2b11-24ea-4535-acac-f971ec821c4b.filesusr.com/ugd/a07927_5f064db23ee148de9a25a2c6c79545db.pdf?index=true
    • https://s3.amazonaws.com/farezelof/erythema_multiforme_bullous.pdf
    • https://a22c3535-4c29-4f26-bf6b-1e631d3648e5.filesusr.com/ugd/28986c_1e4d1436ad6f4d8d9850b3dba7cdea5c.pdf?index=true
    • 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_off00010143.bin
a167b3f7c885e7c5e41bb0e58e65ee572544e8194cfd87724b237698d0728699		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10143 5712 bytes
font_01_sfnt_off000114bd.bin
7c93aaadd5b22b09fc680e8c4c8e61a0916e7a38f905a0029478164acb3c4d98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114BD 10620 bytes

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